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-   -   Philco TA505 TV (http://www.videokarma.org/showthread.php?t=275471)

DavGoodlin 12-27-2022 04:45 PM

Based on the tubes listed, it resembles a typical 1956 or 1957 Philco BW using a transformer. Chassis is TV-330 or 7L41.

That is such a neat piece, but you may need to restuff all those caps to keep it looking original.

bandersen 12-27-2022 04:49 PM

Ah, Dave beat me to it. Interesting to see how their design evolved over time.

old_coot88 12-27-2022 07:59 PM

Quote:

Originally Posted by init4fun (Post 3247418)
I wonder if the empty 7 pin on the audio module might be a 6AV6 (or 6AT6) ?

Maybe I'm dreamin', but didn't Philco use a 6BN6 gated-beam tube at some point? Try a I might, I couldn't spot the empty 7 pin socket (or the buzz control pot that would accompany it).

Dave A 12-27-2022 08:14 PM

Did Philco have a Canada division of some sort? Curious as this is built in Canada and found in Canada. Enquiring minds want to know. And I would like to hear the discovery story.

Gregb 12-27-2022 08:19 PM

Quote:

Originally Posted by Dave A (Post 3247427)
Did Philco have a Canada division of some sort? Curious as this is built in Canada and found in Canada. Enquiring minds want to know. And I would like to hear the discovery story.

Yes there was a Canadian Philco, located in Toronto Ontario.

It was listed for sale on Kijji in Calgary, my daughter lives there and between my wife and her they got it for me, paid $80 for it.

Gregb 12-27-2022 08:20 PM

Quote:

Originally Posted by old_coot88 (Post 3247426)
Maybe I'm dreamin', but didn't Philco use a 6BN6 gated-beam tube at some point? Try a I might, I couldn't spot the empty 7 pin socket (or the buzz control pot that would accompany it).

When looking at the front picture, third module down on the left side, brown 7 pin socket with a control directly below the socket.

Gregb 12-27-2022 08:21 PM

Quote:

Originally Posted by DavGoodlin (Post 3247421)
Based on the tubes listed, it resembles a typical 1956 or 1957 Philco BW using a transformer. Chassis is TV-330 or 7L41.

That is such a neat piece, but you may need to restuff all those caps to keep it looking original.

Thanks, I will have a look

old_coot88 12-27-2022 11:18 PM

Quote:

Originally Posted by Gregb (Post 3247429)
When looking at the front picture, third module down on the left side, brown 7 pin socket with a control directly below the socket.

Oho! Got it. Goin' blind in one eye and can't see outa the other. :o

Gregb 12-28-2022 11:35 AM

Quote:

Originally Posted by old_coot88 (Post 3247435)
Oho! Got it. Goin' blind in one eye and can't see outa the other. :o

I had a close look at how the socket is wired and it looks like a 6AB4 should go there as well as the socket above it. First one being an amp and second a phase inverter for the pp 6AQ5 output stage.

I think later today I am going bring it up very slowly on my PR57 and see what happens. All of the tubes are Philco branded and tested good as new other than the missing one and the horizontal output, it had been changed. I am still planning to recap the power supply and I just noticed the fusistor is missing.

Gregb 12-28-2022 06:07 PM

I chickened out and did not power it up, pulled the power supply and checked the caps two of them are shorted. Good thing I decided to check first. I will re-stuff the old cans and report back when completed.

timmy 12-28-2022 06:22 PM

Can’t let those power supply caps go it’s safer to change them rather then chance burning up the power transformer.

Gregb 12-29-2022 12:47 PM

1 Attachment(s)
I have re-capped the power supply, re-stuffed the cans that were there. Two were Philco brand one was Aerovox so maybe a past replacement. Thought I should check the fuse and the holder was broken so replaced that. Had a five amp fuse in it, thought that was a little high so installed a three amp.

Brought it up slowly on PR57 and I have sound and a full raster but no picture, sorry my picture does not show it but it is full. The tuner is really flaky so will pull that next and go through it.

timmy 12-29-2022 04:51 PM

If any wax caps say goodbye to them

Gregb 12-30-2022 09:27 PM

2 Attachment(s)
Went through the tuner and the vertical/horizontal control modules and I now have a picture. At first there was no sync but I found an open jumper that looked on purpose, maybe the last teaching fault before the unit was retired. I have attached a couple pictures, sorry they are not the best. I can't seem to get a good picture of a crt image.

timmy 12-31-2022 04:55 AM

That’s a huge start it’s getting there.


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