<[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- Hi all,
I picked up a TR-4 at a ham flea market for really short money. I was thinking of just keeping it for parts but it is all there physically and does work somewhat so I have decided to try to refurbish it. I have three problems with it. Two I assume are related and one that is separate. the first two are loss of receive sensitivity on all bands I can receive strong signals fine but there seems to be no band noise and of course weak signals are not there. When I say strong I mean s 10 or above on my other TR-4. The second is the s meter is not working with respect to not being able to zero it and it will not indicate a received signal. With the meter zero control I was able to get the meter which seems to be working it?s self to between s 3 to s 5. The third problem is that in SSB to get proper modulation I have to run the mike gain up about ? of the way using my Sure 444 D mike that works just fine on my other TR-4. I have cleaned all of switches and pots very carefully spending most of a day on them burnishing them with a soft eraser and then with De Oxit and after that some Caig Labs lubricant. I also have pulled all of the tubes and used De Oxit on the pins and checked all of the tubes with a Hickock 800 tube tester. I replaced any tubes that were bad or questionable. I also checked the fuse lamp in final cage cleaning its socket and pins. I cleaned and tested the receive switch on the chassis as well. I powered the Tr-4 up with a AC-4 supply that has been refurbished and works well on one of my other Drake TR-4c?s. I have not made any meter checks on the tubes to check biases. Yet but I am thinking that should be my next step. Is there anything that I am missing here? Transmit CW was low but now it?s putting about 250 watts out into my dummy load on 20 meters so I would really like to get this TR-4 up and running. It?s not a collector quality but for a on air rig it would be nice to refurbish it. Thanks for any help, Matt K1MCN ---------------------------------------------------------------------- On Behalf of <[EMAIL PROTECTED]> Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
