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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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15th Mar 2006, 9:53 pm | #1 |
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Can anyone identify 89D and VCR97 CRTs?
Hi I was all having a tidy up and came across two small crt tubes one is a Cossor 4" marked 89D, and the other is a 6" marked E with a goverment arrow then VCB 97, I wondered if anyone on here knows what they are for many thanks Den
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15th Mar 2006, 10:02 pm | #2 |
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Re: Can anyone identify a couple of small Crts
Hi Den,
the VCR97 is an ex radar tube - green phosphor with electrostatic deflection - Most famous use was in the indicator type 62a as used with the Gee navigation system. I think the cossor tube is a 3" one? again used in military equipment.... Cheers Sean
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15th Mar 2006, 10:21 pm | #3 |
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Re: Can anyone identify a couple of small Crts
the 89D is an early double beam scope tube.
Jim. |
16th Mar 2006, 8:50 pm | #4 |
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Re: Can anyone identify a couple of small Crts
Hi Den, the VCR 97 was very popular with the home built TV people of the 50's, I've still got the parts from mine. It also made a good scope, much bigger than most of the commercial ones available at the time.
The Cossor tube is a true dual beam device and I believe was fitted to the 1035 scope. Quite a long persistace if I remember with a blue trace. Ed |
16th Mar 2006, 9:27 pm | #5 |
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Re: Can anyone identify a couple of small Crts
Hi Den,
Strange, I was just doing that this evening....... Ok, 4v on the heaters (pins 3+4) 2kv ish on the first and third anode 500 ish volts on the second anode. Tie all the deflector plates to HT (for test purposes) I do have a diagram here (Cheers Danny!) that makes more sense...... Or follow this link! http://web.telia.com/~u43200663/inst/vcr97-0.htm Mains EHT hmmmm scary stuff! Cheers Sean
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Engineers make things work and have spare bits when finished Last edited by Sean Williams; 16th Mar 2006 at 9:34 pm. |
17th Mar 2006, 1:35 pm | #6 |
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Re: Can anyone identify a couple of small Crts
I've just had a look at the link and one thing to watch out for is that the adjustment pots are at quite a high (-) potential and if using presets to lash it up you need to be careful when adjusting. Probably stating the obvious again but just thought I'd mention it.
Biggles. |