Posts: 7,305
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
Here the deal old spkr is junk unless you can rewind the fc. Fortunately the fc is in the positive leg of the p/s so the resistance isn't super critical. Generally speaking the low the resistance the less inductance more hum. If you have a suitable eletrodynamic spkr then by all means drop it in. Since your set is a console the larger spkr a replacement pm spkr would have some room to mount a choke to replace the fc. For testing purposes a p/p audio output transformer's primary or the HV secondary of a power transformer or choke where just looking for some inductance.
You can replace it with a resistor but it's pretty inefficient as a filter inductance is much better.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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Rogers Majestic R-646
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| Vlad;
I was just reminded of something else, I'm not sure why but many Rogers built sets do seem to have open primari...Arran — 04:40 PM |
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Rogers Majestic R-646
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| Thanks RpdB
I don't think there's much difference with interstage transformers of different models other than dimersion...Vlad95 — 03:27 PM |
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Rogers Majestic R-646
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| Vlad;
I looks like your set has the same problem that mine did, both a bad output transformer, and a bad audio inters...Arran — 03:21 PM |
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Rogers Majestic R-646
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| Ouch! Not often the secondary takes a hit. Wish there was a better solution. I have a good interstage transformer but it...RodB — 02:59 PM |
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Rogers Majestic R-646
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| By the way, the bypass you suggested is a rare solution in some circuits.
For example, this schematics solution is used...Vlad95 — 01:43 PM |
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Rogers Majestic R-646
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| No, you are wrong, because you did not know the details.
Unfortunately, only ONE winding out of six is intact in both t...Vlad95 — 01:14 PM |
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Rogers Majestic R-646
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| The output 45s are still in push-pull because the transformer secondary winding is still in the grid circuit providing o...RodB — 11:52 AM |
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Rogers Majestic R-646
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| Thanks RodB for the help.
But this is not a real solution to this situation, not even a temporary one. Because the firs...Vlad95 — 11:34 AM |
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Philco Model 16 wiring question
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I was going to check the voltages as you suggested and hooked it up to my dim bulb. It appears I have a short. The bul...bobclausen — 10:34 AM |
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Rogers Majestic R-646
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| You can bypass the interstage transformer by disconnecting the primary, connect a load resistor of about 10k - 20k to th...RodB — 09:40 AM |
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