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drake tr4c manual pdfThese manuals are available for download and free of charge.Contact and submission information belowIt would only be possible with a large scale scanner. Such as a DS-70000 or something else that could scan 11.5x100 paper. See email information below (be sure to include BAMA in the subject line). Compliments of Al Parker, W8UT These manuals are available for download and free of charge.Or, you can email me directly with the manual. I accept all formats. Such as a DS-70000 or something else that could scan 11.5x100 paper. See email information below (be sure to include BAMA in the subject line). These manuals are available for download and free of charge.Or, you can email me directly with the manual. The page you're searching for does not exist. It may have been moved, renamed or permanently deleted. Please go to the main page and try again. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. If you have some stuff that not is listed here you can donate this by contact mods.dk. And when you click on the file or icon it will count as a download. If you want to see manuals from other manufactories you can click on the manufactory menu in the left side. You can also click here to see all the manufactories that mods.dk have manuals, schematics or other files from. Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser.http://www.meselofalu.ro/userfiles/carrier-piping-design-manual-pdf.xml

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Translate this page: Relevant OTHER forum topics: szintetizator Egy ROLAND RD-170 szintetizator egyik billentyujenek erzekeloje elfaradt. Sokkal erosebben kell leutni hogy ugy szoljon mint a tobbi. Raadasul ezek billentyuk kalapacsmechanikasak es a leutes nagysagatol fugg a hang erossege. Tudja valaki hol szerezheto be ilyen erzekelo ami a billentyu alatt lakik. Eloszor is egy szetrobbant feju alkatreszt talaltam. A panelen R71 a jelolese. Alkatreszre ramerve 33ohmot merek,de oly mindegy mert hianyzik a fele. Kerdesem,mekkora erteku lehetett eredetileg? Epitojellegu valaszokat elore is koszonom! Udv:Atis Loven Darts nem ad jatekot(Megoldva) Sziasztok. Ha tud valaki kerem segitsen. A keszulekben nincs ermevizsgalo. Van itthon masik (ami nem a sajatja), de nem tudom hova kell kotni. Ha jol tudom mechanikus ermevizsgalo volt benne ami ket vezeteket zart ossze. Kepet toltok fel, ha szukseges. Elore is koszonom a segitseget.Aki csinalt mar ilyet kerem segitsen, mert kifogytam az otletekbol. Mivel mar nem nagyon van ilyen oreg telefon vasaroltam az ebay-on ilyeneket: Mivel 3,3V-on mukodik epitette hozza MAX3232-bol soros szintattevot. Sajnos semmikeppen nem tudom szora birni:-( A leiras szerint autobaud-ra van allitva, de en mar probaltam indenfele bitrataval 1200-115200-ig, de sajnos sehol nem biztos a kapcsolat. Raadasul ha a terminalbol AT parancsot kuldok ki arra OK-t kellene valaszolnia, de ehelyett o papagaj modra visszakuldi az AT parancsot OK nelkul. Ha azt irom be almafa, akkor ezt kuldi vissza. Az analog resze mukodik, fel tudom hivni, es a rajta levo LED-en latom is hogy hivom. Ha a MAX3232 ki-bemenetet rovidre zarom, hibatlanul mukodik. Mar a vasarolt hardwarere is gondoltam, de kicsi a valodszinusege, hogy mindharom ugyan ugy hibas. Biztos, hogy en vagyok a lama, de nem jovok ra miert. Similar manuals: You can write in English language into the forum (not only in Hungarian). I got it in unworking condition, with a homebrewed AC-4 power supply clone.http://www.monclair.com.br/userfiles/carrier-pc-6000-service-manual.xml As you will see, this TR-4C was in somewhat sad condition, mainly very dirty. So first work was to clean it, starting with a vacuum cleaner. Previously, I carefully removed all tubes. Here you have some pictures of the chassis once cleaned: It was not hard to find some mods done to the unit. Some were cleanly made, some were not so clean. Function: MIC connector replacement Function: unknown Function: replacement Function: replacement After chassis was in decent shape, it was the moment to take the front panel out. Once buttons were out, there was some yellowing clearly visible on the panel: One thing which was evident when I got the unit is that PTO was 'losing balls'.In order to fix it I needed to get the PTO out of the chassis. First thing I did was to remove PTO cover.So I got out the PTO and found a messy oily gearset. So I got out the electronics of the PTO. It is not too evident in the picture but, as the red reference line shows, there was some weird angle in the PTO ferrite, which should be straight. One thing I always enjoy when working with tubed gear is the tube cleaning.So I did it:-). This is one 6JB6A tube as it came from the rig: Yes, there is a relation.Once crystals, tube shields and tubes were clean, they went back to the rig (except for the power tubes, as one is broken): Keep tuned. In order to use this site, your web browser must allow cookies and have javascript enabled. Our cookies contain no personally identifiable information (PII). They are simply a unique serial number used to recognize this unique browser session. By using this site, you aknowledge our privacy statement and agree to accept cookies. Accept Ok Welcome! Thank-you for visiting our online surplus electronic super store. By using this site, you aknowledge our privacy statement and agree to accept cookies. Accept. You will never find more DRAKE manuals for this low price.http://eco-region31.ru/bosch-psb-530-re-manual With these service manuals and schematics, you can easily find the problem if you have little electronic knowledge. Since these are very old manuals, I take pride to give you the best quality schematics, this is why some manuals scans may be listed more than once, but they are never the same file. Scan contrast or resolutions are always different for a duplicate manual version. This DVD ( PC and Mac) compatible contents more than 440 PDF files (Adobe Reader XI), JPG or DjVu!!!. The files are not compressed to save on DVD cost. You will see all the files as you open it in your PC or Mac computer. All the files are listed by models, so very easy to find the critical information. You will always have all the informations of your gear with you to give to your repair shop. Note: Shipping time is about 2-6 weeks in average all around the world by regular air postal service. All files are in PDF Adobe Reader XI version (that can be easily downloaded free on the web) FOR CANADIAN BUYERS ONLY: SALES TAXES (GST, PST, HST) will be added in the Ebay final invoice. No Sales Taxes for USA and International buyers. If you need 1 or 2 service manuals file to beging a fast repair or If you need specific manuals not on the list below, just send me a message and I will be pleased to help you. Need all those files fast by email. No problem, just send me a message when you will buy.You are the light of the world. After restoration, one of theHas the calibrator, print of the manual. AnyI require help in locating a service manual for the drake TR5 as I am trying to Robin G4IWJ. Drakelist mailing listVia Rebecchi, 13 - 41015 NonantolaDrakelist mailing listPry the board out a bit and re-seat them. Look the pins over for any cracksGood luck! Darrel, N0DBX. Ciao Demis, your PLL needs adjustment I think. You know how to do that?Op 23 aug. 2018 om 18:29 heeft Demis Bertoni het volgende Hello! I've a Drake R7A with a problem on changing frequency band.https://academyocgc.com/images/c6100-printer-manual.pdf What happens is shown below:Thank you and 73! Demis IZ4ORS. IZ4ORS - Demis Bertoni. Via Rebecchi, 13 - 41015 NonantolaDrakelist mailing listHave you tried reseating all of the boards. The R7's and TR7's suffer from Simply removing and replacing each board Do the same to each of the Lee WB6SSWFrom: Demis Bertoni. To: drakelist. Sent: Thu, Aug 23, 2018 9:30 am. Hello! Via Rebecchi, 13 - 41015 NonantolaDrakelist mailing listYou know how to do that?Drakelist mailing listI've a Drake R7A with a problem on changing frequency band. Via Rebecchi, 13 - 41015 NonantolaDrakelist mailing listDrakelist mailing listPhotos on request. Prices noted or offer plus shipping.Crystal Frequency gives band coverage ofThanks.Voice Phone (352) 732-8400AC-4, DX Eng processor, etc etc. See here:MN2000.all original and in good condition. I figure 10 for each???Wa2jhs. Drakelist mailing listCrystal Frequency gives band coverage ofThanks.Ken Simpson. Voice Phone (352) 732-8400The AGC only The AGC switch checks out as does the Function switch. A previous owner had jumbled the wires to the AGC switch (probably trying to In Slow, the RX Anyone have a suggestion?Dale W4OP. Drakelist mailing listGuess the PLL needs adjustment, check the procedure in the service manual. I Verstuurd vanaf mijn iPhone. Where's the problem? Drakelist mailing listI've problem with my R7A, this morning during a QSO at 14,222, theWhere's the problem? Do you have a solution to this problem? Many thanks for possible help. My best 73'sVia Rebecchi, 13 - 41015 NonantolaDrakelist mailing listThis is the mic that was used to add a touchtone pad toFour pin mic plug. This one has been used, but is in good shape andA low pass TVI filter is added to the transmitter toAll of these will handleThis is the latest, most modern low pass filter made by. Drake. Its cut off frequency is just above 10 meters.https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1629b46c762a74---Countax-chipper-shredder-manual.pdf It will handle 1500 W below 30 MHz, and has 80 db minimumIt has extra attenuation in theIt is designedThis one looks fine and works fine.These are all original manuals for R L Drake equipment, and are not The above are original manuals for Drake equipment. Prices do not include shipping from Florida. I also have many other accessories available such as manyJust too many to list here. Please e-mail your requests. Thanks.Ken Simpson. Voice Phone (352) 732-8400Thanks. Milt Taylor, WA3MDS. Sent from my iPad. Drakelist mailing listI have some Drake equipment including a. C-Line, two tranceivers and external VFO's, a tuner, and speakers,power I need to scale down my WA4CFG left it to me. I think RF Parts or Mouser Electronics may have the parts Drakelist mailing listOn Wed, 7 Sep 2016 14:09:05 -0500, Bob Burkett wrote. If I have to makeThis was recently discussed in the Yahoo DrakeRadio group. The upshot is no oneYou may be able to retrofit with somePA deck parts can be purchased from RFParts. Mouser is a good source for mostDrakelist mailing listI am engaged in repair of a Drake TR-7. Would someone please tell me where. I can buy some of the small intra-board coax cables. If I have to makeIs there a list of reputable sources from which I could purchaseBob Burkett K5DCZThe synchronous detector Unlike some Hope this helps. Art, KB3FJO. A close friend who is facing some health challenges is considering a Drake R-8 Thank you joe k7mks. Drakelist mailing listThank you joe k7mks. Drakelist mailing listNov.5th. You can attend in person or via internet. Details will be posted Jenks K5YNZ. Drakelist mailing listI am looking for a good photo of the top and bottom of the circuit If you have these photos please email them Drakelist mailing listDrake WH-7 HF Wattmeter. The Drake WH-7 is a directional through-line wattmeterA removable couplerIt has three calibrated scales ofA fourth calibrated scaleThe WH7 has a wired remotableThis one works fine and looks fine.www.cruiseride.com/userfiles/files/Canon-tx1-manual.pdf Drake WV-4 VHF Wattmeter. The Drake WV-4 is a directional through line wattmeterIt has selectable calibrated scales of 0-100 and 0-1000The WV-4 has a remote coupler, with SO-239 connectors inThis particular unit looks good, and works fine as well. Drake TV-1000-LP. This filter may also be used on the low end of six meters, as wellDrake 1525 EM Touchtone (DTMF) Microphone. This is the mic that was used to add a touchtone pad toNormal hand mic from theFour pin micOriginal Drake manuals. These are all original manuals for R L Drake equipment,The above are original manuals for Drake equipment. Voice Phone (352) 732-8400. Drakelist mailing listDrakelist mailing listMic on the TX-4B or were the cabinets shipped pure black with no white It there any effective way to reduce the copper chassis discoloration. Thank you joe k7mk3. Drakelist mailing listI have for sale. TR-4C sideband transceiver, no noise blanker. RV-4 remote VFO. AC-4 power supply. MS-4 speaker. Digital readout (DD-103 Universal Digital Dial) by Electronic Specialty. Products LLC. Have 2 sets of final too. No microphone or watt meter. I am the original owner. Do not have the boxes. Selling as a complete station. Can be picked up at Dayton Hamvention.Pictures on QRZ KD8JZR. Thank you. Charles - KD8JZR. Drakelist mailing listMessage me for details if you are. Price is. Drakelist mailing listWoodinville, WADrakelist mailing listDrakelist mailing listI would like to ask for advice on the repair of a pair of drake t-4XC that have During transmission in cw, sidetone returns normally, except that in addition I know there is some problem on the circuit sidetone but I would like an The second. The second t-4XC (that is, what iuse every day as main rig) recently has the For me a bit annoying though, and if possible I would like to fix it.Many Many thanks. Paul, IK1QHB. Drakelist mailing listBegin forwarded message. I still have the fl-500 and the.https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1629b46cf9c7cf---countax-garden-tractor-manual.pdf Drakelist mailing listDTMF Touch Tone Microphone, Low Pass Filters, plusDrake 1525 EM Touchtone DTMF Microphone. This is the mic that was used to add a touchtone pad toIt is a normal hand micFour pin mic plug. This particular unit has been used. Drake Low Pass TVI Filters. A low pass TVI filter is added to the transmitter toAll of these will handleDrake TV-3300-LP Low Pass Filter. This modern low pass filter has been optimized to have moreThis one looks great. Drake TV-1000-LP Low Pass Filter. This filter may also be used on the low end of six meters, asJohnson 250-20. This cylindrical low pass filter has a cut off frequency ofRated at 1000 W. AM, or 5000 W PEP SSB. It is adjustable so you can get ridOriginal Drake manuals. These are all original manuals for R L Drake equipment, andThe above are original manuals for Drake equipment. I also have many other accessories of many different brandsJust too many to list here. Drakelist mailing listBoth of them Have been professionallyThey are near collector quality. Price is firm atBill Watson KC4WNI. Drakelist mailing listThe PS7, though working yesterday, The 2N3566 isn't passing anything so I don't quite understand where the. MC1723 is getting its supply from to turn on the 2N5060. Any ideas what my next move should be?I have broken up the station and am selling each item spate (will also Shipping is not included and some items will be pickup only or you arrange Summit DCS LLCDrakelist mailing listMine didn't come with the correct ones. The Name your price. Thanks. Drakelist mailing listDrake MN-4 C. The Drake MN-4 C is a 300 watt antenna tuner covering fromThe MN-4 C is much different than the plain MN-4. It is a betterIt really is very close to anI can not find a scratch or defect on it. It includes the original manual, in the original box (including the. Drake B-1000 Balun. This balun can be used on almost any of the Drake tuners. It isCompared to other KW rated baluns, this.https://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1629b46d893371---Countax-instruction-manual.pdf A low pass TVI filter is added to the transmitter to reduce harmonicDrake TV-3300-LP Low Pass Filter. This modern low pass filter has been optimized to have moreIF. It is good for 1000 Watts average according to the manual,This one looks great. This filter may also be used on the low end of six meters, as well asJohnson 250-20. This cylindrical low pass filter has a cut off frequency of 45 MHz,Rated at 1000 W AM, orThe UV-3 was manufactured by the R.L.Drake Company in. Miamisburg Ohio in the late 1970's. It is a classic! It is one of the first fully synthesized rigs covering both theFrequency coverage is 144-148 MHz and 440-450 MHz. It has exceptional adjacent channel and intermodulation rejectionSub-audible CTCSS PL tones were not originally included with the. UV-3, but this unit has a Comm Specs TE-32 mounted on top of itThis transceiver works 100 as best I can determine on 2 m and 440. MHz and is in extremely good cosmetic condition. It has the 220 MHzIt includes the original Drake hand mic, power cord, and paper. Drakelist mailing listThis equipment is Premium quality. Cosmetics are wonderful. All units work This is one superb RX.Has Heathkit shop power Also, I replaced all components I really don't want to ship the AMP for obvious reasonsso pickup (or meet Also, You are welcome to come see this equipment in person. Please contact OFF list. Give me a call or e-mail with any questions. I am good in QRZ.KC9CDT Columbia. City, IN 46725Drakelist mailing listVery rare Drake Model. Photos on request. Best offer. Dr. Bruce Felder, K3BF. Pensacola, FL. Drakelist mailing listSN 44110 Has been checked and serviced in AprilDrakelist mailing listMy collection includes: a 1A; an unmodified C-Line purchased in 1977 alongDrake gear, including a Theta-550 Communications Terminal. A complete list and photos are on Flickr. Here is the link. W8WO Drake Collection on Flickr The current operatingI am offering all the Drake items together, not individually. The buyerGrand Rapids.www.fishinnj.com/userfiles/files/Canon-tx1-manual-pdf An auction has begun on ebay (“Ham Radio Collection Drake”) with a starting. I thank you for allowing me to share this information. Drakelist mailing listPS-7. Help in finding one will be appreciated. Maybe you know a replacementDrakelist mailing listHello, I am looking for the FA-7 for my TR-7. I plan on using it for the. PS-7. Help in finding one will be appreciated. Maybe you know a replacementThe FA-7 is an off-the-shelf fan. Somewhere in the bowels of the internet youIf not, I can look on one ofI have a box full of the Papst 32 CFMDrakelist mailing listMost are a bit There are 12V fans available that Also, the regular fans can be had at. You will usually pay big PS-7. Help in finding one will be appreciated. Maybe you know a replacement Drakelist mailing listThe FA-7 is an off-the-shelf fan. Wally, Dilbert. Drakelist mailing listThe UV-3 was manufactured by the R.L.Drake Company in Miamisburg. Ohio in the late 1970's. It is a classic! It is fully synthesized and covers both the 2 meter and 440 MHzFrequency coverage is 144-148 MHz and 440-450 MHz. It features modular heavy duty construction. It has exceptional adjacent channel and intermodulation rejectionTransmitter is Direct FM and has excellent transmit audio. Sub-audible CTCSS PL tones were not originally included with the. UV-3, but this unit has a Comm Specs TE-32 mounted on top of itThis transceiver works 100 as best I can determine and is inI can only find one scratchIt includes the original Drake hand mic, power cord, and both. This low pass filter may also be used on the low end of six meters,Kenwood PS-30 Power Supply. This 20 amp 13 V DC supply was originally made to go with theIt featuresRipple voltage isThe PS-30 has a heavy duty power cord with the standard 6 pinYaesu rigs. It also has terminals on the back for lowerThis one works fine and looks good as well. It includes paper. Drakelist mailing listDrakelist mailing listPensacola, FL. Drakelist mailing listDoes anyone on the list knowIf so please let me know. I have one that needs a little. TLC done to it. Please email me at my QRZ email address. Thanks very much. Gary W9VSSuch as a modelI'll take some suggestionsDrakelist mailing listDrakelist mailing listSection 2-4.3 in From: Bill Watson. Sent: Thursday, March 05, 2015 4:24 PM. Anyone know of a hand-held mic to use with a TR7. Such as a model number,brand I'll take some suggestions on what works Drakelist mailing listSeems not many areDrakelist mailing listAny help much appreciated. 73,Bill, KC4WNI. Drakelist mailing listExcellent, asAlso two of the reproductions purchased from Joseph Roth in 2007.It's also listed on QTH with a picture. Thanks very much. Gary W9VSAll units are currently inFar less than normal usageNo tinkering, alterations nor tube replacements haveMust be shipped in two separate packages. CarrierAntivirus protection Sent: Tue, Feb 10, 2015 1:32 pm. Members:All units are currently in Far less than normal usage of Must be shipped in two separate packages. Carrier of Drakelist mailing listAntivirus protection Will ship double-boxed inAlso have several MFJ tuners for sale and Yaesu FT-101 accessoriesDrakelist mailing listAny of you have a TR7 500khz filter that you feel is excess and would Drakelist mailing listAny of you have a TR7 500khz filter that you feel is excess and would Carl WD8NHK. Drakelist mailing listSent: Friday, November 14, 2014 1:58 PMThe 5595 kHz oscillator part of the second mixer 12BE6 Charles W4KEP. It may well be the crystal. Replacements can be I've bought many They know the You might want to post also to the other drake list Los AngelesAs far as I canReplacements can be obtained from I've bought many crystals from them and all were You might want to post also to the other drake list at:At one of your suggestions IIt works fine -Charles W4KEPAlumni Distinguished Professor of ECE Emeritus. Virginia TechBlacksburg, VA 24060-5731If you or a friend have a crystal notDennis AE6CAs far as I canReplacements can be obtained fromI've bought many crystals from them and all wereThe 5595 kHz oscillator part of the second mixer 12BE6 circuit does notAs far as I canCharles W4KEPAlumni Distinguished Professor of ECE Emeritus. Virginia TechBlacksburg, VA 24060-5731Not sure if I'm just not doing it quite right It looks like the fitting may have The fitting does not If anyone else has had a similar I suppose you could I can avoid that. Thanks and 73. Randy K4EZM. Drakelist mailing listNot that easy to do by feel, you really need to get aUnless the socket has been clipped short by someone whoThe shield clamp can be re-tensioned somewhat, but it's not meant to grab veryIt's mainly an electrical connection rather than aTrying again on this: has anyone had a problem with the coax lead from Not sure if I'm just not doing it quite right It looks like the fitting may have The fitting does not If anyone else has had a similar I suppose you could I can avoid that. Drakelist mailing listDoctor, Amy?s Choice. Drakelist mailing listDear fellow Drake enthusiasts. I know this may be a long shot, but I am attempting to get a TC-2, two meter It basically works, but has low output The final output tube is a 8643 and I would like to find a data sheet on this So, does anyone out there have access to an 8643 data sheet. I have searched Ted SchurterDoctor, Amy?s Choice. Drakelist mailing listPlease contact Tom, ABOJ.The actual receive will be off Drakelist mailing listI bought my first Drake about 25 years ago. Sold it later and then boughtRecently I acquired a Drake TR4C which this time around will be a keeper. Hard to believe, that after 40 years, they still sound pretty damn good andThanks RLDrake Company. Ruben W2ARB. Drakelist mailing listGeorge K4GM. Drakelist mailing listDrakelist mailing listRick KD6ZR. Thanks Mike. Good info. I took a look at circad --- whew! Pricey. I've got a couple of Gang. The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching Mike wb8vge. Drakelist mailing listExpress is that you cannot do anything else with the result. Not even There are several free packages.some good, others not so much, that do I have used freePCB and the free version of viewmate from Pentalogix to Starting with a fully documented schematic with bill of material makes Cheers. CurtRick KD6ZR. Drakelist mailing listFree, for the trial version with no restrictions other than no pcb bigger than I would never use software that locks into one company, ties all your work to Mike Bryce WB8VGENot even print out the Starting with a fully Even the mailing envelopes are purple. I am currently teaching myself I took a look at circad — whew! Pricey. I’ve got a couple of projects that. I’ve been wanting to have a board or two made up but not at that level of Even the mailing envelopes are purple. I am currently teaching myself Drakelist mailing listPurple is the color of royalty,Gang. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I am currently teaching myself Mike wb8vge. Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit Where do you get your boards made? I ask because I have two of Drakelist mailing listYou select the output with MTA.100 header and plug. This project is about done. I’m in the process of having a small run of pcbs Mike, WB8VGE. SunLight Energy Systems. The Heathkit ShopA man with one clock knows what time it is. A man with two clocks is never Drakelist mailing listWhere do you get purple boards made, Mike?Boys and girls? I?ve been working on a replacement calibrator for the drake R4b. This You select the output with MTA.100 header and plug. I?m in the process of having a small run of pcbs Lincoln, Nebraska, U.S.S.A. Give a man a URL, and he will learn for an hour; teach him to Google, and he HyGain 3750 User's Group - Where do you get your boards made. And, what software do you use to lay them out. I ask because I have two of the. AC-4r kits and greatly admired the boards.The purple pcbs are made by a company called osh park. I am currently teaching myself eagle. That's been slow. Mike wb8vge. Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit Where do you get your boards made? I ask because I have two of The warning my save some VFO dials.). Back in the middle ages, (the 60s), I had a TR-4 with metal gears in the VFO I did this on a constant basis with no ill effects. Then Drake came out with the C-line twins and I had to have one of the new R-4C When getting them I did the same thing to I called Drake and I did this and again in I do know Drake did some experimenting back then I do know the very last VFOs were again One more caveat, Never ever put a petroleum based grease or lubricant on The plastic This warning I know a lot of you guys know all this, but maybe the warning can save a few. VFOs owned by newcomers to Drake. Drakelist mailing listWe all know that the RTL parts used in the calibrator are no longer being made. So, if your calibrator in your R4B goes kaput, then you're screwed. This year at the dayton hamvention I talked to Ron, WB4HFN, about the problem I needed the dimensions. So, after lots of paper and a few broken pencils, a prototype pcb has been Same foot print as the original. You have your choice of either 100, 50, or 25 The pcb will have.100 MTA plug assembly that plugs into the board. It supplies There is no A 3.2mHZ crystal is oscillated and divided by a 7 bit ripple counter. You can There is an on-board regulator to keep the oscillator stable and an adjustment This is a prototype board. The next run will have some corrections made and I The board is a hybrid. It has both through hole and surface mount components. The final cost of the pcb has yet to be determined. I don't know if I will If anyone is interested in the remaining two prototypes let me know and I'll Right now, I don't have an R4B to install one, so will be looking for someone Mike, WB8VGE. Mike Bryce, WB8VGESunLight energy systems. J e e p. Drakelist mailing listI don't need the AC-4. Supply, but would consider that too if in same great condition. NoNon-Smoking shack. Original. Packaging is a plus! Pictures are a MUST. Paul, K2FX I would like to be able to build a clone and that is the only part that Also, since these units are very Thanks in advance. 73 - Ken Miller, K6CTW. Drakelist mailing listNeeds small bit of work.