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Sez the guy whose call ends in “SBD” :-D I’d actually prefer putting some prawns on top for 15 minutes. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from

Hi, Sorry for the delay. Thanks for the advices. I've tested my TR7 with an external "laboratory" PSU and saw that the RF signals (LO, BFO, etc...) were all affected by a heavy noise. My scope on

Sweeps were designed for pulse operation. Low average, very high peak power. That's why they can be run so hard with CW or unprocessed SSB. 73 -Jim (no fish were harmed or killed during creation of

*** That was around 1970. I was in high school. Had a lot of fun with that project, and learned a lot. Nowadays, I am much more conservative in how I treat tubes...and transistors!

*** Not at all. Especially if they're nicely breaded. - Jerry, KF6VB

They smell bad when they get hot. Joe WB9SBD

well keep in mind that the tubes were designed as horizontal output tubes for TV sets. That is continuous operation. What kills them is when you exceed what the ratings are and what the manual tells

The front panel, cabinet and copper are a huge determinant. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent with [Proton Mail](https://proton.me/) secure email.

I was trying for a G rating. Pushing the output from 150W to 200W is less than 2dB but can exceed tube ratings (17.5W per tube, so 52.5W per trio)/.6 = 87.5W, continuous. So running 200+W out is

Thanks Steve. The R4A, that I have is a 13 tube receiver and the PS was rebuilt in the spring of this year. Now I have an idea what they might be worth. Barry Sent from Mail for Windows

That's very true. Fish have no place in final amplifiers... joseph n. graif k4jng

*** I once built a linear into an ARC-5 transmitter cabinet. It had 4 6LQ6 tubes. I bought them at Radio Shack, which had a *lifetime guarantee* on their tubes. I put that Radio Shack receipt in an

The older Twins’ value is determined by, in this order, cosmetic condition, operative condition and which version of the receiver you have. It’s a somewhat complex calculation. A really nice

I will qualify that. 200W, on 40 & 80, into a dummy load. 180W on 20 150+ on 15 & 10. Yes, 100W is low, especially with replaced tubes -- though 8 years is enough time to wear them out if proper

Can someone please give me an idea what a R4A and T4X might be worth. I have a pair and would like to part with it. I just spent a small fortune on new tubes for the R4A. Guess I will need to eat

Can someone please give me an idea what a R4A and T4X might be worth. I have a pair and would like to part with it. I just spent a small fortune on new tubes for the R4A. Guess I will need to eat

170-180 out here….. Joe – W7RKN From: [email protected] [mailto:[email protected]] On Behalf Of Joe WB9SBD Subject: Re: [DRAKE-RADIO] TR-4 #ForSale 100 watts is not right. Every

100 watts is not right. Every TR-4 I have ever had and used has made close to 200 watts CW OUT. some even a bit more. 100 watts and something isn't right. Joe WB9SBD

This equipment has all been sold. Thanks Joe Z. for reminding me about this ad. 12-31-2024. Need to thin out the radio collection, the kids are starting to worry about how much work it's going to be

I /believe/ the "pointed end" (with the lead sticking out) is + ? Tantalums do NOT like to be hooked up reverse polarity! Let us know how you do. 73, Jim W7RY -- Thanks and 73, Jim W7RY