Looking for 7DP4 or GL-4592

[Ralph S]

Hi: I just recently picked up an RCA 621 and the crt checks with a blown filament. Does anyone know if Dennis Choinski still has any of his GL-4592s? Or does anyone out there have a working, spare 7DP4 they'd like to sell? I realize I'm probably asking for the moon! Help!!!

[miniman82]

Reasons like this are why I proposed building a run of clones at RACS...

[kvflyer]

Don't forget to check the pins to be sure that the solder on the filaments are good...

[Ralph S]

Count me in, Nick, if your do get a chance to build these or the guys at RAC do it.

[Electronic M]

Sometimes one can re-weld a break in the filament(if one can find a position at which it has intermitant continuity ie the halves of the break touch) by charging a capacitor and positioning the tube so the broken halves touch YMMV.

[andy]

....

[DavGoodlin]

Originally Posted by Electronic M

Sometimes one can re-weld a break in the filament(if one can find a position at which it has intermitant continuity ie the halves of the break touch) by charging a capacitor and positioning the tube so the broken halves touch YMMV.

The stuff we collectively know here is remarkable.

Another source of HV, limited current is an oil burner ignition transformer. I may have an opportunity to do this.

[Sandy G]

Originally Posted by DavGoodlin

The stuff we collectively know here is remarkable

Boy, ain't THAT th' Truth !! Amazes me every day...(grin)

[Electronic M]

Originally Posted by DavGoodlin

The stuff we collectively know here is remarkable.

Another source of HV, limited current is an oil burner ignition transformer. I may have an opportunity to do this.

I don't deserve credit.
I think I read about that method here some months back.....It has just kind of stuck in my mind.

[bandersen]

I just picked up a 621 and find myself in the same boat - the 7DP4 filament is blown

[vts1134]

Originally Posted by bandersen

I just picked up a 621 and find myself in the same boat - the 7DP4 filament is blown

You have been checking off that want list pretty nicely .

[pearsonk]

I have not seen many 621's in the last few years become available with a
good crt, that's why they are so many showing up.
I have a vg crt but have been looking for the 621's wood bezel [the one over the
crt] for several years - I would pay for a decent bezel, or even a 621 with a
known bad crt [if reasonable].

[bandersen]

Originally Posted by vts1134

You have been checking off that want list pretty nicely .

Indeed - three in one weekend They all have issues, but that'll give me something to do for the next few years.

[tvdude1]

Originally Posted by Ralph S

Hi: I just recently picked up an RCA 621 and the crt checks with a blown filament. Does anyone know if Dennis Choinski still has any of his GL-4592s? Or does anyone out there have a working, spare 7DP4 they'd like to sell? I realize I'm probably asking for the moon! Help!!!

If I have 2 I can spare one will look.

[tvdude1]

Don who runs the ETFauction had rebuilts from HawkEye. You can contact him. I had one rebuilt works super.