25" Magnavox color tv

[eberts]

The 25VCX has the Mag mounting tabs.
The 25VED will sub, if you saved the old RCA mounting brackets that it came with, you can use those.
That chassis will punch a hole in the neck of the tube when the critical safety cap goes defective. That chassis is easy to destroy if you are not careful with test leads.
If it gets a vertical problem, the tube neck will be punctured, but I don't remember what part was bad.

[Tomcomm]

Originally Posted by eberts

The 25VCX has the Mag mounting tabs.
The 25VED will sub, if you saved the old RCA mounting brackets that it came with, you can use those.
That chassis will punch a hole in the neck of the tube when the critical safety cap goes defective. That chassis is easy to destroy if you are not careful with test leads.
If it gets a vertical problem, the tube neck will be punctured, but I don't remember what part was bad.

First the Maggi becomes a bomb if I hobble-up an improvised mounting for my substituted Heath kit CRT. Now its special four lead "safety device" capacitor will burn a hole through CRT neck or break the neck completely off if it fails open like mine did! Maybe its such a hazard to humanity, I should take it way out back, dig a deep hole and bury it!....just kidding.

I ordered two original part number, four lead capacitors for $5 each plus $5 shipping. I hope this is the only problem with the EHV system and the CRT has not gone to air due to a hole in its glass.

[Tomcomm]

I lost ultor voltage and the circuit breaker never tripped. The "safety cap" blew its end off and opened the drive to the horz amp that checks good.

Just how does any failure in the horz circuitry destroy a CRT?? Some claim it punches a hole thru the envelope and even breaks the CRT neck off?

I'm wary about replacing the safety device with a new exact part number I just bought and powering up the set. I hope someone can make me less paranoid.......Tom

[Tomcomm]

-Well, I installed a modern 4 leaded capacitor "safety device" and it operates with no heroics! The new device is made of polyester film, similar to the orange drop Spragues. Seems the two leads on each end have built-in fuzzes as an additional safety feature. I am comfortable with this setup.

The CRT is running on 8vrms and is plenty bright for the time being, besides I've got two spares when and if this one gets really bad. I'm running on a channel 4 modulator but will install an external video op amp to bring in composite video from my DVD and ASTIC converter box. This will be the same circuit I'm using on my RCA 21CT55 shown as my Avatar.

This 25in Magnavox probably initiated the "Silver Star System" with the introduction of random-channel-selection with
on-screen channel readout and on-screen clock. Also possibly unique is its ultra-sonic transmitting remote. Probably inspired by the desire to circumvent the infer-red signaling patents.

Thanks again to everyone who expressed interest in this project, especially Brian bgadoe who sent me the Sams folder on this set.