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  #1  
Old 08-04-2016, 10:12 PM
Electronic M's Avatar
Electronic M Electronic M is offline
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Ethical dilemma: Do I scrap an Admiral to fix a Predicta?

I scored what amounts to a $20 Predicta Debutante with an original Philco 17DAP4 CRT that has an open heater.
DSCN2002 by Tom Carlson, on Flickr

I have about $25 in an Admiral I have in working order which has a 17DSP4 CRT that I believe would fit the Predicta.


This Admiral ain't exactly rare (I've seen at least 2-3 others), or valuable.
Do I kill it to get the Predicta to live?

I also have a potential source of a good used and or NOS CRTs for it, but odds are it is going to cost me ~$60-200 (need to talk with the seller more) for one. Should I pursue that instead?

There also is potion C: pop the admiral CRT in the philco, make the philco work (if it can), then (if successful) get a new jug for the philco and return the admiral CRT to it's original set.

What say you?
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Old 08-04-2016, 10:38 PM
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Nice Admiral TV! And a nice Philco! In my opinion, I would see first about getting the other CRT that you said was available. If not, and you really want to get that Predicta rolling, I would take the CRT out of the Admiral but don't scrap it. Maybe you can find another CRT for it later on. I always try to not scrap out something that is working, such as your Admiral is. Just my opinion on this. Good luck and nice haul!
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Old 08-04-2016, 10:43 PM
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well. Which one do YOU like better? Make that one work.
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Old 08-05-2016, 05:20 AM
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Kamakiri Kamakiri is offline
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I would.
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Old 08-05-2016, 07:57 AM
Mre12ax7 Mre12ax7 is offline
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The 17DSP4 may not be the best chioce.
It has a 11 1/4" neck the original is 10 11/16"
You want to look for these
17DAP4, 17DEP4, 17DKP4, 17DRP4, 17DTP4, 17DXP4, 17DZP4.
I say leave the Admiral alone.
It works the Predicta doesn't.
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Old 08-05-2016, 09:46 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by Electronic M View Post
I scored what amounts to a $20 Predicta Debutante with an original Philco 17DAP4 CRT that has an open heater.
DSCN2002 by Tom Carlson, on Flickr

I have about $25 in an Admiral I have in working order which has a 17DSP4 CRT that I believe would fit the Predicta.


This Admiral ain't exactly rare (I've seen at least 2-3 others), or valuable.
Do I kill it to get the Predicta to live?

I also have a potential source of a good used and or NOS CRTs for it, but odds are it is going to cost me ~$60-200 (need to talk with the seller more) for one. Should I pursue that instead?

There also is potion C: pop the admiral CRT in the philco, make the philco work (if it can), then (if successful) get a new jug for the philco and return the admiral CRT to it's original set.

What say you?
Hang loose for a little while. I'll see, if the 17" CRT I have in an RCA portable is good. It has the odd-ball 8.4 volt, 450ma heater, but that could be worked around.
BTW, the pin-out is different on the Philco CRT, vs the Admiral tube.
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Old 08-05-2016, 09:54 AM
andy andy is offline
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Last edited by andy; 11-18-2021 at 05:42 PM.
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  #8  
Old 09-16-2016, 08:57 PM
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Electronic M Electronic M is offline
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Quote:
Originally Posted by andy View Post
I've had some success repairing open heaters by zapping them with a high voltage source. A neon sign transformer seems to work well (60Hz iron type, not electronic). It has enough current to weld a small gap, but not nearly enough to burn out the heater. It often takes several tries before it will hold, so don't give up if it doesn't work at first.
I tried that using a Zenith color as a source. B+ nothing, 1+KV boost nothing, damper lead that killed a DMM I once touched to it by accident....That made a nice consistent blue arc inside the CRT, but nothing like a weld (even with banging on the neck)...That tube is toast.
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  #9  
Old 09-16-2016, 09:27 PM
tom.j.fla tom.j.fla is offline
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Gents lets all remember that Toms debbie has a power transformer in it. So the RCA jug with the 8 volt heater is not going to work, a 17 inch jug from a kcs 126 will work with a little rewire, which I have done now with six Philco sets with the 10L43 chassis. All the the best, Tom J from Fla
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