The PHILCO Phorum
Model 70 - Printable Version

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RE: Model 70 - morzh - 01-11-2018

Or, if Steve's (very generous) offer will take more time then you would like to wait, simply take a trimming cap (provided you have one as buying it will also take time) of maybe 20-40pF and solder it there.

RE: Model 70 - vecher - 01-13-2018

I was able to get screw out Now all I have to do is find a 4-40 brass screw..Local hardware store I hope..

I am certainly learning a lot by doing this Radio..

Caps came in so I can recap the Main cans.. They cleaned up really nice using Vinegar..

Thanks to all for all the offers ..Really appreciate it..

Skip..

RE: Model 70 - vecher - 01-13-2018

Was able to find a screw It fitted good and now back in business.. I hope.. Next is put Tuning Cap back in with new washers.. Then on to putting the Main Caps back in.. Parts did arrive for re-stuffing the caps.. Had ordered 6.8 uf at 630 Volt..


Skip...

RE: Model 70 - vecher - 01-17-2018

Ok Tuning Cap back in.. Looks good. Caps back in.. Working on putting the power Transformer back in.. Almost done with that.. Then I have to install the replacement Output Transformer on the Speaker.. Then on to power up..

So getting there...

Skip...

RE: Model 70 - vecher - 01-20-2018

OK,, I forgot about Speaker.. I think I have a bad Transformer.. I will double check.. But how do you get the transformer off??

I would assume drilling the rivets  But Not really sure how to do that with out damaging the speaker..

Help...

[Image: https://farm5.staticflickr.com/4743/25933558278_0a61925a7b_b.jpg]


Skip...

RE: Model 70 - Steve Davis - 01-21-2018

Skip, you need some sort of a stop on your drill bit, either a collar or a piece of tubing slipped over the bit that will not let the bit go through and puncture the cone. The only other safe way, would be to remove the cone.

Steve

RE: Model 70 - EdHolland - 01-21-2018

You could also use a drill bit that is larger than the rivet. Proceed slowly until the head of the rivet is removed, and then the transformer should lift off. The remainder of the rivet can then be pulled out of the speaker frame

Of course you, must plan to replace the fastener when reattaching the transformer.. Check to see that you can get a screw and or nut into the space beneath the speaker frame without damaging the cone. 

Best of luck,

Cheers,

Ed

RE: Model 70 - Steve D - 01-21-2018

You could also carefully grind the rivet heads off with a Dremel.

Steve D

RE: Model 70 - vecher - 01-21-2018

What kind of bit would I use for that.. New to using a Dremel.. What would it look like..

Skip...

RE: Model 70 - vecher - 01-21-2018

Ok Was able to get the screws out. By grinding and drilling.. The Transformer is Bad.. But I have a replacement. So wired it in and looks good.. Now to find screws and nuts to fit..

Getting there..

Skip

RE: Model 70 - vecher - 01-22-2018

Ok found screws and mounted transformer.. all looks good.. On to power up..

At 115 Volts drawing about .8 amps .. The B+ was approx 260 Volts..Not sure what it should be.. Receiving stations across band.. So all looks good so far.. I didn't even put on the tube shield yet..

So on to alignment .. Probably just needs a minor adjustment.. I hope

Then on to Cabinet.. I know have 2 cabinets ready for Refinishing this one and a Crosley 124.. Hope the person I found close by can do them..

PS actually I think the Crosley sounds better than the philco..


Skip...

RE: Model 70 - vecher - 01-22-2018

Ok did a little more voltage checks..

RF Tube 24 Pin 2 289 Volts
1ST det 24 Pin 2 292 volts
2nd Det 24 Pin 2 241 Volts

Osc 27 Pin 2 82 Volts

Output 47 Pin 2 278 Volts

B+ 294 Volts

All voltages Reference to B- Not Ground

115Volts AC at .720 Amps 82 Watts

Question the OSC tube only has 82 volts on it Is that normal? I see there is a 13K resistor to B+ so I assume 82 volts is correct..

Skip..

RE: Model 70 - vecher - 01-28-2018

Ok, Alignment complete.. No problems.. Bought a alignment tool on ebay .. It made the process very easy.. The IF 's were off quite a bit.. Radio now plays better than before.. Playing well now on bench.. So now to get the Cabinet repaired,,

Skip

RE: Model 70 - mg34.42 - 03-18-2018

I should have a good power transformer
bnenny