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This is JMHO but I don't bother with the "push to read relative power" load thing. I just use an external wattmeter, which is what you're already using. -- Craig/W8CS Greenville, SC

Any one of the three are good. I have heard that RCAs in a trio (TR3/4) may need additional capacitance in the neutralising cap. They really don't need to be matched. All of the parts used in the PA

Yes this tubes was designed for TV sweep circuits, so 6JS6, 6KD6, PL509 etc and fortunately can serve as RF pwr amps. I'm already retired and after 50 years of license finally I was able to get a

The tube was first made for TV use The shorter envelope was first and all other brands copied that. It was later that the long tube came out. Note the tube was invented for TV use not drake radio use.

Hi Steve; Yes, will be all the same brand but not a matched trio. But all NOS. I guess GE is a good option too. 73 Marcus PY2PLL Em 26/05/2025 15:17, Steve Wedge, W1ES/4 via groups.io escreveu: From

Hi David: Yes, they're will not be mixed. All from the same brand, but not matched (from RF Parts). Interesting that on RCA tube description they say: "For Horizontal-Deflection-Amplifier. For use in

There is an IO group devoted to Leo Myerson's equipment. Leo made a huge impact on amateur radio. If you have an interest, please join us at: /g/WRL-Galaxy-Radios Tnx, Dale W4OP

Filament is still in tact. Probably because I didn't give it enough time to blow again. Mark

When tuning up my second TR-4CW the current meter goes to 0 when I push in the load control to tune it. I can see the load control working on my external power meter just nicely. I figured it was the

Did you check the filament fuse? 73 Mike W5RKL https://www.w5rkl.com

I was trying to re-seat the LSB bulb to the chassis because the bulb was intermittent. In doing so I think the positive side of the bulb housing touched ground some how because when I turned the

I should have clarified my statement by saying: "*The transmit speech amplifier's audio "/alone/" does not flow through the IF filters."* 73 Mike W5RKL https://www.w5rkl.com

The transmit speech amplifier's audio does not flow through the IF filters. The "IF" filters are for "RF" not "AF". The DSSC (Double Sideband Suppressed Carrier) signal from the BM (Balance Modulator)

Hello Burt, still have this for sale? joe WA2L Acworth, GA

From my experience, stick to GE or Sylvania. Do not mix brands unless you can spot the differences in the internal frame. There are two or three different frame types. Steve Wedge, W1ES Time flies

In thinking about this, I think I see what is going on. Audio goes the the screen modulator which modulates the gain of the final..?? I think this is that same as the old novice rigs like the T-60

I would stay with one brand. Do not mix. RcA also sells a longer version of the tube that will not fit so make sure you are getting the shorter version. David Assaf III W5XU VP8RXU

Gentleman: For a TR-4C, is there any difference between 6JB6A brands? I'm buying 3 of them and there's some well known brands available such as Sylvania, GE and RCA. RCA a bit cheaper. All NIB/NOS.

This is the way most modern rigs create AM. It is SSB with carrier and has an emission designation. The audio response is limited by the bandwidth of the IF filter and the opposite sideband is

The following items have been added to the Files area of the [email protected] group. * /RCA_CA3053.pdf ( /g/DRAKE-RADIO/files/RCA_CA3053.pdf ) *By:* Jim Shorney