[Drakelist] TR-3 SOS
Greetings, I have a Drake TR-3 that the volume pot. has gone out at the lower volume levels. Once the pointer reaches the 1200 position it works, but the volume is so loud you cannot bear it. I have tried contact cleaner, but that does not improve the situation. So I don't think it's dirty, but I have been wrong before. Got any ideas on a replacement for the volume Pot on the TR-3? Thanks in advance for your help. Got to keep it going. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 2 'B' line Qu's
Paul - A T-4XB with good finals should put out about 130 W in TUNE position on 80, 40 and 20. 120W on 15 and 110 on 10. This is into a good dummy load, with an accurate wattmeter. These power levels are limited by ALC, you'll notice that the power increases linearly as you increase the GAIN, but flattens out at about these levels. On CW, more power can be obtained by further LOADing as ALC is NOT active on CW. Typically 150W on 40M. If the dial is discolored by UV exposure, there is not much you can do about it. If it's a nicotine coating, GoJo White Hand Cleaner _MIGHT_ take it off without removing the numbers as well. I've never tried it though. Another possibility is to use one of the clear discs found at the top and bottom of stacks of recordable CDs. Scanning your dial, or another good one, printing it on clear label material and sticking them together. Again, I've not tried it, but is what I would try, given the need. Be sure and let us know of any successes, (or failures!,) you may have. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Paul Gerhardt wrote: 1. How much power should a good T4Xb put out into a dummy load in CW key down? 2. Has anyone ever cleaned a partly 'yellowed' round dial (the part with the numbers on it)? Thanks and 73's Paul K3PG www.pgerhardt.blogspot.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-3 SOS
n4...@coastalnet.com writes: I apologize for this automatic reply to your email. N4BNO Hmmm auto shut down and you want a lists help.but the return address was NOBODY etc...good luck. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR-3 SOS
The original question message had clear reply-to info when it showed up here. nothing unusual about it. Curt KU8L gypsym...@aol.com wrote: n4...@coastalnet.com writes: I apologize for this automatic reply to your email. N4BNO Hmmm auto shut down and you want a lists help.but the return address was NOBODY etc...good luck. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] 2C Audio Problem
My 2C has been working fine. This morning when I turned it on, the audio is rather loud, there's some hum that wasn't there, the AF Gain control has no control over the volume and when muted by my 2-NT the hum is louder through the speaker. When the AF Gain control is turned either full up or full down it breaks into oscillation. Any idea where the problem might be? TNX Gary N2UM ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 2C Audio Problem
Gary - Quite likely a high ESR in C40, possibly and/or C48. Simply paralleling a capacitor of similar size across each one should resolve the problem. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Gary Winkelman wrote: My 2C has been working fine. This morning when I turned it on, the audio is rather loud, there's some hum that wasn't there, the AF Gain control has no control over the volume and when muted by my 2-NT the hum is louder through the speaker. When the AF Gain control is turned either full up or full down it breaks into oscillation. Any idea where the problem might be? TNX Gary N2UM ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drakelist Digest, Vol 19, Issue 18
Garey, Tnx for the good info. I have a replacement dial that is MUCH clearer than the original so will try washing it gently and use it I think. The homemade one would be something to try. It sounds like it would work. Wonder if a CD label program would work? The kind that prints on the CD directly? On the transmitter I was able to Check into ECARS today but with very low power. Here is what I am seeing. If I screw the bias back I see up to 80 watts with the plate meter pegged hard over. With the bias set 'properly' I only see power output if I turn the RF Gain up to where the meter is again pegged to the right. When it hits the pin I am getting 5 - 7 watts. When the modulation 'looks' right on the meter I am getting 5-10 watts pep out but the plate meter is kicking up all the way. I am hearing anti vox coming out the speaker while in SSB is this normal? I would think not? The R4B seems to be working well. The two VFO are transceiving using either or both with the inj cable connected. I am going to start 'dusting, cleaning and visual inspection' Paul - A T-4XB with good finals should put out about 130 W in TUNE position on 80, 40 and 20. 120W on 15 and 110 on 10. This is into a good dummy load, with an accurate wattmeter. These power levels are limited by ALC, you'll notice that the power increases linearly as you increase the GAIN, but flattens out at about these levels. On CW, more power can be obtained by further LOADing as ALC is NOT active on CW. Typically 150W on 40M. If the dial is discolored by UV exposure, there is not much you can do about it. If it's a nicotine coating, GoJo White Hand Cleaner _MIGHT_ take it off without removing the numbers as well. I've never tried it though. Another possibility is to use one of the clear discs found at the top and bottom of stacks of recordable CDs. Scanning your dial, or another good one, printing it on clear label material and sticking them together. Again, I've not tried it, but is what I would try, given the need. Be sure and let us know of any successes, (or failures!,) you may have. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Paul Gerhardt wrote: 1. How much power should a good T4Xb put out into a dummy load in CW key down? 2. Has anyone ever cleaned a partly 'yellowed' round dial (the part with the numbers on it)? Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
