So how hard could it be? - Printable Version
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So how hard could it be? - Music in a bottle - 11-28-2009
I again pulled the chassis from my model 70, to lubricate the controls. Again, I was wondering, aside from the RF coils, how difficult it would be to restore the chassis electrically? I have a good grip on replacing the electrolytics, but is it mandatory or recommended to replace the resistorstoo? What would be the aproximate cost to recap the model 70? Also, Would it be advisable to open up the power transformer for visual inspection or would this be total folley? I finally have a spot cleared to attempt the restoration, but am leary as to whether I should try it or farm it out to the professionals
If I do attempt it, I will be sure to put up plenty of pictures, so you all can get a good laugh at the very least! 
Re: So how hard could it be? - Music in a bottle - 11-30-2009
Really? That easy? Okay, I'm doing it!
Re: So how hard could it be? - Chuck Schwark - 11-30-2009
One very important note when restoring this set.
BE SURE youe have the speaker connected BEFORE powering the set!!!
You can over-stress or short the power supply components without the field coil completeing the circuit.
Chuck
Re: So how hard could it be? - Ron Ramirez - 11-30-2009
Music in a bottle Wrote:Again, I was wondering, aside from the RF coils, how difficult it would be to restore the chassis electrically?
Not terribly difficult. Have you attempted to rebuild bakelite block caps before? If not, read this page at Chuck's site:
http://www.philcorepairbench.com/capbuild.htm
Quote:I have a good grip on replacing the electrolytics, but is it mandatory or recommended to replace the resistors too?
Not mandatory. But do check each resistor, and replace if it is not within 20% of specified value.
Quote:What would be the approximate cost to recap the model 70?
If you are replacing paper and electrolytic capacitors only, maybe $10-20.
Quote:Also, Would it be advisable to open up the power transformer for visual inspection or would this be total folley?
No reason to do so unless you suspect the original has been stressed in the past (overloaded, wax leaking from the bottom and/or all over the chassis)
Quote:I finally have a spot cleared to attempt the restoration, but am leary as to whether I should try it or farm it out to the professionals
Cool, please do post pictures and keep us posted on your progress! Enjoy!
Re: So how hard could it be? - Music in a bottle - 11-30-2009
I have read your info exclusivly! While I never rebuilt a bakelite block, I look foreward to it. I still need to get a soldering iron and practice on a couple cheap radios first. Will be dialing up the operation after the first of the year. The coils will likely be coming your way Ron, so hope you still have a spot for me! The speaker and both transformers are excellent. Just wondered if opening them up was part of the tour. That part has been canceled! Photos will be coming, and I will be talking with my pops a great deal too!
Re: So how hard could it be? - Music in a bottle - 11-30-2009
I should also add, that I will be relying heavily on your expertise and wisdom as I chug along. Is there a place or person who has kits availible. You know. A packet that could be bought with all ther parts I would need, or will I need to line item each part seperatly? First stop is to download a schematic.