Re: [Drakelist] Drakelist Digest, Vol 35, Issue 15

Drakers, I too have the same problem and was going to do what Garey suggests, but had other stuff pop up (weddings, health, family, and PSK-31 bug bite), so have not tried anything yet. Waiting with baited breath to what Joe finds. I made my own cables and thery are the same total

[Drakelist] Adding filtering capacitor

Is there any advantage of adding a large filtering capacitor if there is no issue with the radio? Is a larger capacitor worthwhile and will it result in smoother power? ___ Drakelist mailing list Drakelist@zerobeat.net

Re: [Drakelist] Adding filtering capacitor

It depends on what the application is. DC filtering in a rectifier circuit? Bypass for a grid/cathode? Coupling capacitor for audio stages? Etc. etc. If indeed it is for filtering, and in a rectifier circuit, it can improve regulation if the power supply is unregulated, it can reduce the

[Drakelist] TR-4C Bias

I have a TR-4C that I cant set the bias on. When adjusting the bias control on the power supply it has no effect on the radio. I have 2 power supplies and both have no effect. I can remove the bottom cover from the supply and set the bias to the proper - voltage using my volt meter but it does

Re: [Drakelist] TR-4C Bias

Bill - I'm guessing here, since you didn't specify. Do you mean when you key the transceiver you have NO PLATE current, or LOTS of PLATE current??? Assuming you have NO PLATE current, which is most likely, consider that the PA tube normally want to draw as much current as possible when

Re: [Drakelist] TR-4C Bias

What does the PA current read with the RF gain at zero and the PTT switched to transmit? If it is high, then that might suggest an issue with the circuitry at the finals. Hard to guess if it is low and not adjustable. Curt KU8L Billy Loyd wrote: I have a TR-4C that I cant set the bias