RCA WR 50B Signal/Sweep Generator Power Up & Calibration

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RCA WR 50B Signal/Sweep Generator Power Up & Calibration

Рет қаралды 2,173

Жыл бұрын

Partial restore and power-up of a vintage 1975 RCA signal/sweep generator using a minimal approach to calibration.
I fixed the audio in this copy of the original so it's more pleasant to listen to.

Пікірлер: 17

@Homer19521 7 ай бұрын

Great vid. I just sold mine last year & you made me regret that a bit. I never cal'd the sweep part so that was very helpful. 👍

@DVRproductions52 7 ай бұрын

You're very welcome, thanks for the comment!

@qzorn4440 Жыл бұрын

Wow, a wealth of knowledge. 😎 Thank you.

@sorcererstan Жыл бұрын

I have one of these but never tried to calibrate it. Thanks for the video!

@DVRproductions52 Жыл бұрын

The directions from RCA can be a little confusing alright.

@vintagetubeamplifiers Жыл бұрын

I like that little Powerstat, that box looks great.

@DVRproductions52 Жыл бұрын

Me too! Thanks for the comment.

@hullinstruments Жыл бұрын

Wonderful! Glad to see more

@hullinstruments Жыл бұрын

Oh my bad this is a re-upload from a few days ago. But I will gladly watch again

@DVRproductions52 Жыл бұрын

No problem, I noticed that one channel of the audio dropped out completely in the editor so I re-rendered it. KZfaq won't let you replace a video so I had to upload a whole new one.

@erguy6319 5 ай бұрын

Great video, thanks. I have a same signal generator, and try to calibrate it. I had the R9 adjusted to 6V and calibrated all A to F bands without much trouble. But I can not get the wave form on oscilloscope for 455 khz and 10.7 Mhz sweep. Read the instruction which is not quite help since the way it did need crystal. I do have frequency counter. My question is can I calibrate 455 kHz and 10.7 MHz with the frequency counter (with the Modulation switch in Ext without any signal input) instead the wave form? Thank you in advance.

@DVRproductions52 5 ай бұрын

You only need the crystal if you want a marker to appear during sweep mode. The 455 Khz. signal is adjusted using L7 (See Pg. 42 of the manual), L8 for 10.7 Mhz. You should be able to calibrate using a freq. counter. Actually, the dial of the RCA is so far off that you'd probably want to use a freq. counter anytime you use the generator just to be accurate. -- The direction manual IS kind of confusing especially when it comes to where to set the MOD & VFO switches. I just had to fiddle with the settings to get the output I wanted. Later I'll try and see what the proper sw. settings are to cal. the generator and get back to you.

@erguy6319 5 ай бұрын

Thank you very much for your reply. I will try to calibrate the L7 and L8 with frequency counter, then try the RCA on some transistor radios. By the way, when I read the manual, it mentioned the original testing cable has a 0.001 pf 500 V cap built in, so I soldered a 0.005 pf 1000v cap that I have before the BNC output. @@DVRproductions52

@nortonics5745 5 ай бұрын

How many times did you mutter the sound "uh"? I'll tell you - a pathetic number of times.

@DVRproductions52 5 ай бұрын

Yeah, it bothers me too and I'm trying to do better at that.🙄

@stevenbliss989 Жыл бұрын

The sine wave from the generator looks AWEFUL!!!!!! Is there any adjustment for that??????????????

@DVRproductions52 Жыл бұрын

Actually no. You should see my other (3) vintage generators sine wave. This is the best of the lot and it's typical for these. It's just the way they are, believe me, I've tried. Sometimes I think they were designed that way so they could take advantage of the harmonics of a poor sine wave to get 2X the frequency out of them if needed or to create a dot or bar pattern on a TV.