And the bottom of the chassis
All I have done so far was to clean the controls, this is the way I got it otherwise. It has been serviced before.
It uses a 913 display tube, a pair of 6C6, an 80 (of course!) and an 885 gas thyratron triode.
Most of the capacitors are original, I want to replace only the ones I have to. (against my own normal advice). I will clean up the previous work. I had though I had gone over this before completely, wrong.
-Chris
All I have done so far was to clean the controls, this is the way I got it otherwise. It has been serviced before.
It uses a 913 display tube, a pair of 6C6, an 80 (of course!) and an 885 gas thyratron triode.
Most of the capacitors are original, I want to replace only the ones I have to. (against my own normal advice). I will clean up the previous work. I had though I had gone over this before completely, wrong.
-Chris
Attachments
Hi poobah,
Nah, it did work. The 913 is good. I want it to work again.
It's the other half of my tube hobby that doesn't make noise.
I do have to clean it up. The knobs are about to go into the ultrasonic cleaner. I will use a toothbrush (gently) on the front panel.
This was built in the late 30's I think. It deserves some respect. Only because it still exists if nothing else.
-Chris
BTW poobah, quick response!
Nah, it did work. The 913 is good. I want it to work again.
It's the other half of my tube hobby that doesn't make noise.
I do have to clean it up. The knobs are about to go into the ultrasonic cleaner. I will use a toothbrush (gently) on the front panel.This was built in the late 30's I think. It deserves some respect. Only because it still exists if nothing else.
-Chris
BTW poobah, quick response!
Alright
Here's a guy with an operators manual...$14
http://www.agtannenbaum.com/r_cat.html#RCA
Just use an old tee-shirt (cotton only) on the front with watered down tooth paste. Nylon bristles will scratch...honest.
Here's a guy with an operators manual...$14
http://www.agtannenbaum.com/r_cat.html#RCA
Just use an old tee-shirt (cotton only) on the front with watered down tooth paste. Nylon bristles will scratch...honest.
Hi poobah,
If I can get this fella working I may buy that manual. First I need to fix it. Looks like someone just got it going, then I cleaned the controls.
Hi Hugo,
If you can dig anything up on this, I'll be very impressed! It's an oldie. So, YES! Thank you very much!!
The resistor does look burned in the picture. It's a 2K, measures 2.13K. Not bad for the age. Sadly, I believe you are right. Many paper caps that may be bad. All kinds of soldering. I just wanted to leave it as stock as possible.
I do have to clean up the replacement electrolytics.
It's all my fault. I should never have dug it out. Ignorance is bliss!
-Chris
If I can get this fella working I may buy that manual. First I need to fix it. Looks like someone just got it going, then I cleaned the controls.
Hi Hugo,
If you can dig anything up on this, I'll be very impressed! It's an oldie. So, YES! Thank you very much!!
The resistor does look burned in the picture. It's a 2K, measures 2.13K. Not bad for the age. Sadly, I believe you are right. Many paper caps that may be bad. All kinds of soldering. I just wanted to leave it as stock as possible.
I do have to clean up the replacement electrolytics.
It's all my fault. I should never have dug it out. Ignorance is bliss!
-Chris
Chris,
Copy this inot your browser: look about 1/3 1/2 down the thread, this guy has manuals:
http://216.109.125.130/search/cache...ic+oscillograph&d=ELbRAg0DL_90&icp=1&.intl=us
This guy has stuff for TVM-122 oscillograph
http://www.sarrio.com/sarrio/rsman3.html
Copy this inot your browser: look about 1/3 1/2 down the thread, this guy has manuals:
http://216.109.125.130/search/cache...ic+oscillograph&d=ELbRAg0DL_90&icp=1&.intl=us
This guy has stuff for TVM-122 oscillograph
http://www.sarrio.com/sarrio/rsman3.html
Hi Hugo,
Thank you kindly sir. I have already sent an email with some positive remarks back. We shall see. Poobah's link worked fine for me (Netscape 7.2), so there may be a browser issue.
Poobah,
Thank you very much for your link. We will see what becomes of it. You never know ....
Geek,
Cool, see if it's still there. If it's not expensive it'll make a really neat edition to your test bench. I enjoy earlier instrumentation. You can get a feel for the state of the servicing art back then by using these. I am hearing dates of 1936 ~ 1938 for these. Since I have radios from the same era, this becomes very interesting.
I feel that understanding the early art will give me a much better understanding of the current art. I guess I want to know where "we" came from in the world of electronics.
-Chris
Thank you kindly sir. I have already sent an email with some positive remarks back. We shall see. Poobah's link worked fine for me (Netscape 7.2), so there may be a browser issue.
Poobah,
Thank you very much for your link. We will see what becomes of it. You never know ....
Geek,
Cool, see if it's still there. If it's not expensive it'll make a really neat edition to your test bench. I enjoy earlier instrumentation. You can get a feel for the state of the servicing art back then by using these. I am hearing dates of 1936 ~ 1938 for these. Since I have radios from the same era, this becomes very interesting.
I feel that understanding the early art will give me a much better understanding of the current art. I guess I want to know where "we" came from in the world of electronics.
-Chris
Well Chris,
I think Mr. Netlist hit the REAL jackpot with names & addresses. Hope somebody pans out for you.
If memory serves me right... all those wax caps will have drifted about 20-50% high over time.... might not matter to you. I have actually ripped the leads out of each end of those things and taken the foils out with drill bit (slowly)... then slip in an Orange Drop with the leads extended and fill it up the wax again...
You can put on some gloves and wipe the goods ones with a towel and boiling water... makes 'em look new!
good luck... I let ya know if/when that guy emails back... I stilll haven't gotten an "undeliverable" yet... with spam filters these days, it hard to email friends sometimes.
Dont y'all just HATE SPAMMERS?????
I love UPS & FEDEX; the only time they bring me something... it's something I WANT!!!!!!!!!!!!!!!!!!!!!!!!
I think Mr. Netlist hit the REAL jackpot with names & addresses. Hope somebody pans out for you.
If memory serves me right... all those wax caps will have drifted about 20-50% high over time.... might not matter to you. I have actually ripped the leads out of each end of those things and taken the foils out with drill bit (slowly)... then slip in an Orange Drop with the leads extended and fill it up the wax again...
You can put on some gloves and wipe the goods ones with a towel and boiling water... makes 'em look new!
good luck... I let ya know if/when that guy emails back... I stilll haven't gotten an "undeliverable" yet... with spam filters these days, it hard to email friends sometimes.
Dont y'all just HATE SPAMMERS?????
I love UPS & FEDEX; the only time they bring me something... it's something I WANT!!!!!!!!!!!!!!!!!!!!!!!!
Hi poobah,
Normally I would have thought of that. Duuuh! Thank you for reminding me of the obvious option. I'll recap the entire unit in that case. I will only change out of tolerance resistors.
Poston Drake has offered to snail mail me the information. This is a very kind gesture. The wonderful people willing to help each other sight unseen is very heartening. The same can be said for the members of this site. It makes me happy to be a member of the human race.
-Chris
Normally I would have thought of that. Duuuh!
Thank you for reminding me of the obvious option. I'll recap the entire unit in that case. I will only change out of tolerance resistors.Poston Drake has offered to snail mail me the information. This is a very kind gesture. The wonderful people willing to help each other sight unseen is very heartening. The same can be said for the members of this site. It makes me happy to be a member of the human race.
-Chris
anatech said:The wonderful people willing to help each other sight unseen is very heartening. The same can be said for the members of this site. It makes me happy to be a member of the human race.
-Chris
That's true Chris, and I'm still thanking you for many times that YOU made me happy to be a member of the human race
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