Philco 90 Power Up

[Ronbob59]

Rick... Great job, as always. You should surprize us one day and show one you can't fix??? That one probably doesn't exist...

Ron

[AllAmericanFiveRadio]

Hey Ron,

Thanks. Well I'm not done yet. It has a catchy, level, noise problem, but it functions. Could be a noisy resistor, tube, capacitor I forgot to replace, capacitor I did replace, or all the above. But it functions.

Rick

[eufaula1]

Great series Rick!!! Great job on that coil!!

[AllAmericanFiveRadio]

Thanks, Im listening to the radio now.

[joernone]

Rick,

About this coil stuff...I'm not sure what you mean by the primary being not tuned. Could you elaborate a little?

Also, how did you determine the thickness of the coil wire and where did you get it?

Lastly, I recently repaired and restored a Philco 620B that had a million bakelite capacitor blocks. I restuffed every single one of them. What a chore. Can't believe my first vintage radio mentor wussed out by putting new caps on the outsides of the blocks. tsk-tsk :)

Regards,

John

[AllAmericanFiveRadio]

Hey John,

The Primary is not a tanks circuit, no variable capacitor across it. I used the closest gauge of wire I had and I got it from Radio Shack. If the bakelite caps show then I would. I don't refill paperwax capacitors either.

Regards,

Rick

[batterymaker]

THIS is what I love about this hobby!

[AllAmericanFiveRadio]

Yep, it fascinates me every time.

[Froggy19510]

I have a few old radio with voice coil speakers. I was wondering if you would do a talk on how to use regular permanent magnet speakers in their place. I would also like to know if you know where a person could get speakers rebuilt. Thanks.

[AllAmericanFiveRadio]

I Googled (field coil speaker repair) and found these. They are all DOTCOMs, speakerex, approvedaudioservice, parts-express. Thanks and I hope this helps.

[Froggy19510]

Thanks! I'll check them out.

[jenko701]

Nice ,Video the setup with the rf gen ,I love that part. Great video.

[AllAmericanFiveRadio]

Thanks.

[w4twa]

I was wondering on the last video how you were able to determine the correct amount of turns you needed to rewind that coil? Did you merely wind until the resistance matched that stated in the service data, or did you somehow know the inductance?

[AllAmericanFiveRadio]

The primary side of the transformer is not tuned so if you get the coil reasonably close, it will work. Now if it was the tuned side, the secondary, that is totally different. You would have to reproduce the coil exactly. In this case that would be a real pain because you would have to do both because of how it is constructed.

[CoolDudeClem]

Nice work, it's sounding good. Was it receiving an AM or FM broadcast? It sounds good enough to be FM, but I wouldn't have thought an old radio like that would be capable of receiving FM.

[AllAmericanFiveRadio]

This one is AM. It was made about 1931/32 and AM radios back then were design much better than most AM radios made today. Seems strange but true. Thanks.

[BassmasterBling]

Thanks for another video. I always look forward to your next video!

[AllAmericanFiveRadio]

Thanks!