Philco 48-700 Double Wammy a bake & shake

[Red Raster]

It will be a while before this set lives up to it's reputation as the
"TV repairman killer". If finding that a imploded 7JP4 wasn't bad enough,
A further inspection of the chassis revealed a bad power transformer T100.
Careless preparation for shipping was the last indignation, How can anybody
ship a set without checking to see if the chassis was at least bolted down?
If any thing I was surprised to find no cosmetic damage even the safety
glass and printed logo was unharmed. I have a good 7JP4 that needs a base
and I now have a good base with a Philco logo that needs a CRT. As for the
power transformer well that may be rather difficult.

[cwmoser]

I likey the looks of the Philco 48-700.
1948 era when some TVs styling still looked somewhat like Radios.

http://www.myvintagetv.com/philco_48-700.htm

Carl

[Kamakiri]

Why did the set have such a bad reputation? Could it really be worse than RCA color sets of the 1960s?

[David Roper]

It has 60 cycle high voltage, if you know what I mean.

[decojoe67]

Year ago, when I first started to collect TV's, the Philco 7 incher's were high on my list. I was disappointed to find that they are very finicky and finally gave up with them.

[Eric H]

Originally Posted by decojoe67

Year ago, when I first started to collect TV's, the Philco 7 incher's were high on my list. I was disappointed to find that they are very finicky and finally gave up with them.

The 48-700 is a completely different chassis that the later 702 models with the crummy HV transformers. I believe it uses a high voltage transformer that runs directly off the AC power like the pre war sets do as David referred to, a deadly situation because of the high current involved.

Was the CRT damaged in shipping? I believe it's supposed to have a 7GP4 instead of the 7JP4 but I hear they can be used as a sub.

[47'Plymouth]

Try Heyboer Transformer in Grand Haven,Michigan
To build you a new power transformer just send the original
Top and bottom cover bells and they'll make new one from scratch
Just give the trannys electrical spects
Here's the number to call them (616)642-3731
Www.heyboertransformers.com
Yours Jody

[Jon A.]

Originally Posted by David Roper

It has 60 cycle high voltage, if you know what I mean.

Yup, that would be more than enough, considering that 220/240 line voltage will do it.

[Red Raster]

Thank you for looking and giving your incite on this challenging but doable
restoration. A special thanks to Jody (47'Plymouth) for the valuable information on a important resource.


Together this set will produce an image.


A good base with the Philco logo is all what is left of the original picture tube, It will replace the broken base on the replacement tube. 7GP4 or 7JP4 numbers are shown in the service manual.

Find, rewind or put inside a new supply will be options for the power transformer.
More to follow