Re: [Drakelist] Removing the Load Variable Capacitor on a L-7

I have a magnifying glass and a bright light, so I should be able to see pretty good down there. I do know the area (back of the cap near the tube) where the problem is occurring, so that will help also. “.and an improperly adjusted tension/spacing nut on the rear.” I saw that nut and

[Drakelist] L4B/L7 power supplies

I've had numerous L4/L4B amps over my 47 years as a ham and fixed about just as many. Still have 3 of them here in different stages of projects. One thing I have always disliked is the heat from those 50K resistors. I can fry an egg on the top of my power supplies. That is a lot of

Re: [Drakelist] Removing the Load Variable Capacitor on a L-7

- Original Message - From: Roger White rwhitete...@verizon.net To: drakelist@zerobeat.net Sent: Sunday, July 29, 2012 6:53 PM Subject: [Drakelist] Removing the Load Variable Capacitor on a L-7 I have had a Drake L-7 sitting on the shelf unused for a few years now and recently

Re: [Drakelist] Removing the Load Variable Capacitor on a L-7

I have removed the tube nearest the back of the load cap and can get at the bearing adjustment. The adjustment is REAL sensitive and so far I have not been able to achieve a non shorting state, but it is better (so to speak!). I will try the ohm meter test this afternoon and make some small

Re: [Drakelist] Removing the Load Variable Capacitor on a L-7

Hello Roger and group, I had the same problem with an L-7 I bought some time ago. It came without P/S, was cheap and had 3-500ZG with graphite anodes from RF Parts. But I was aware of a short in the load cap because you could hear it when turning even without RF applied. I bought the whole