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Predicta Holiday restoration
A friend picked up this set last fall and I'm going to take a whack at restoring it. It's a 1958 Philco Predicta Holiday with 9L37 chassis. The cabinet has seen better days plus the channel knob and antenna are missing, but otherwise it looks OK.
Hopefully, the gunk on the screen will buff out. A few months ago I found a channel knob on ebay The CRT has been replaced with a 6 volt version and it tests good. Not great, but good. As for the chassis, the fuse resistor had exploded and the thermistor vaporized! I think all of the components are original. |
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I certainly will be tuning in for this resto.
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Yeah me too, Bob you're a brave man for tackling one of these! At least with the Philco T&C you've been slightly seasoned to Philco's chassis design and layout!
Cheers Glen
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Visit my Vintage TV & Radio Page - http://nzvintagetvradio.blogspot.com/ My YouTube Link - http://www.youtube.com/user/glenz1975?feature=mhsn |
Audiokarma |
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Hey Bob! Can you snap a close up of the bad socket for me? I might be able to get an exact replacement for you.
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My TV page and YouTube channel Kyocera R-661, Yamaha RX-V2200 National Panasonic SA-5800 Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20 Pioneer SX-939, ER-420, SM-B201 Motorola SK77W-2Z tube console McIntosh MC2205, C26 |
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Hi Mark. Does this help ? I'm sure it used to look like the one on the left before it broke apart.
Yeah, the T&C was great practice. Those wirewrap posts are no longer intimidating. Good thing too - I have four more Predictas after this one Last edited by bandersen; 08-19-2012 at 07:31 PM. |
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Yep, that helps a lot! I'll let you know asap if I find one, if I do it's NOS, not a used one.
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My TV page and YouTube channel Kyocera R-661, Yamaha RX-V2200 National Panasonic SA-5800 Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20 Pioneer SX-939, ER-420, SM-B201 Motorola SK77W-2Z tube console McIntosh MC2205, C26 |
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Cool, thanks.
It turns out this set has had a few more repairs than I first realized. There's an extra electrolytic can under the chassis and a few other replacement parts scattered around. I also found that in addition to the fusistor and thermistor all 3 sections of the filament dropping resistor as well as the pilot light are open. What the heck happened to this set ?!? I figure one tap of this resistor was cut when the 6.3v CRT was installed. |
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That was the chassis that helped bankrupt Philco. Long time dealers dropped their products. They were such dogs.
IIRC, that was the only Philco that used the Zenith type gated beam audio detector. |
Audiokarma |
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I finished recapping the main board without any problems
Pulled the K4 network too as I've heard they are often faulty. The components to make a new one are in the foreground. Maybe I should pull the K3 network too ? Has anyone tried to make these networks plugable ? I'm thinking maybe reuse some PC board mount tube or transistor socket pins Last edited by bandersen; 08-22-2012 at 08:53 PM. |
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Plugability seems low priority to me. If you build a new network, it may outlive everyone reading this post.
Phil Nelson |
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Those modern Micas and Metal Film? caps are probably good for a hundred years or so. Of course, that's what they thought about Sprague Bumblebees too.
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Quote:
Sure, but I'm hoping I won't have to replace all of them. I have five Predictas to restore each with a few networks on the PCB. So I was thinking if I put some socket pins in on of the sets, I could test all the networks before bothering to replace them. Also gives me a way to test the reproduction networks easily. Last edited by bandersen; 08-23-2012 at 09:38 PM. |
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While I ponder the K networks and search for a tube socket, I'm moving onto the chassis underside. One electrolytic and a bunch of power resistors were replaced at some point.
One corner is finished so far. I've been using over spec resistors e.g. 2W for 1W and 3W for 2W. I found one cap held in place by this nifty strap and was able to reuse it. Very handy Anyone know where I can get more ? |
Audiokarma |
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