I have a Tekronix type 321A oscilliscope with a burnt out filament in the CRT. I cannot get another CRT according to some of the sources I've tried. Does anyone have schematics and/or parts available?

Richard Reedel

: I have a Tekronix type 321A oscilliscope with a burnt out filament in the CRT. I cannot get another CRT according to some of the sources I've tried. Does anyone have schematics and/or parts available?

: Richard Reedel

Hi Richard,
I don't have any information on your CRO but I find it surprising that the filament is burnt out unless it has had too high voltage applied. Before condemming it check the soldering on the filament pins on the base if it has one, there could be a dry joint. Of course if it uses wire pins through the glass this won't apply. There are web sites dedicated to collectors of Tektronix equipment, that have service information and spares. I don't have the address at my fingertips but you should find them if you search for "Techtronix" with your search engines. If I can find them I'll send you some addresses. I hope that you get it going OK, It is beautiful equipment. Have a very Merry Christmas and a Happy New Year. Don.

Thanks Don and Richard,

I'll try to find the Tektronix collectors websites.
I have to dig out the crt, I had it out and unfortunately when I moved it got filed in a different place to the o-scope. When I find it, I'll post the model/type of tube.

Thanks again,
Happy New Year,
Richard Reedel
Coombs, B.c Canada
: : I have a Tekronix type 321A oscilliscope with a burnt out filament in the CRT. I cannot get another CRT according to some of the sources I've tried. Does anyone have schematics and/or parts available?

: : Richard Reedel

: Hi Richard,
: I don't have any information on your CRO but I find it surprising that the filament is burnt out unless it has had too high voltage applied. Before condemming it check the soldering on the filament pins on the base if it has one, there could be a dry joint. Of course if it uses wire pins through the glass this won't apply. There are web sites dedicated to collectors of Tektronix equipment, that have service information and spares. I don't have the address at my fingertips but you should find them if you search for "Techtronix" with your search engines. If I can find them I'll send you some addresses. I hope that you get it going OK, It is beautiful equipment. Have a very Merry Christmas and a Happy New Year. Don.

go to this URL and you will find all the part numbers
that fit that scope for CRTs. Also 1 a month sells on
Ebay.

http://www.reprise.com/host/tektronix/reference/crt.asp

Regards, Dana.

: : I have a Tekronix type 321A oscilliscope with a burnt out filament in the CRT. I cannot get another CRT according to some of the sources I've tried. Does anyone have schematics and/or parts available?

: : Richard Reedel

: Hi Richard,
: I don't have any information on your CRO but I find it surprising that the filament is burnt out unless it has had too high voltage applied. Before condemming it check the soldering on the filament pins on the base if it has one, there could be a dry joint. Of course if it uses wire pins through the glass this won't apply. There are web sites dedicated to collectors of Tektronix equipment, that have service information and spares. I don't have the address at my fingertips but you should find them if you search for "Techtronix" with your search engines. If I can find them I'll send you some addresses. I hope that you get it going OK, It is beautiful equipment. Have a very Merry Christmas and a Happy New Year. Don.

Richard,

If you can track down the CRT type, a local surplus store here has quite a few NOS and used round CRTs of the types used in Tektronix and other scopes. I'd be more than happy to check.

Richard

I have a Tek 321A for sale for $400 totally restored.

RE: I have a Tek 321A for sale for $400 totally restored.

I have one also, which works fine, but I cannot guarantee calibration.
Make offer if interested.
kichman@supernet.com

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