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Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

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Old 8th Jul 2019, 5:06 am   #1
FStephenMasek
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Join Date: Jul 2011
Location: Mission Viejo, California, USA
Posts: 39
Default F. Stephen Masek's Bush SAC21 restoration

This is an interesting radio with an attractive cabinet design. I'm waiting for a shipment of new "rubber" tuning gang mount grommets, but have started the electronic restoration and polished the chassis yesterday.

https://i269.photobucket.com/albums/...C21asfound.jpg

https://i269.photobucket.com/albums/...%20started.jpg

Last edited by AC/HL; 8th Jul 2019 at 11:42 am. Reason: Second link repaired
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Old 13th Jul 2019, 7:06 pm   #2
FStephenMasek
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Default Re: F. Stephen Masek's Bush SAC21 restoration

The soft "rubber" grommets from Renovated Radios have been installed, along with regular grommets on holes for wires (Ace Hardware in the USA is a good source)

https://i269.photobucket.com/albums/...20grommets.jpg
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Old 14th Jul 2019, 9:18 am   #3
terrybull
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Default Re: F. Stephen Masek's Bush SAC21 restoration

I like your jig for mounting the chasis. Did you make it.
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Old 17th Jul 2019, 6:03 pm   #4
FStephenMasek
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Default Re: F. Stephen Masek's Bush SAC21 restoration

Terry, I bought that jig and a larger version from Steve Strong. Please see
http://radiostands.com/

The antenna transformer had an open coil, L-1. Somebody had coated it with what appeared to be candle wax. I wondered why I found what seemed like wax spilled on a tube socket and another place in the chassis... The form containing L-1 and L-2 goes inside the form for L-3 and L-4. Whoever worked on it last also had lost one of the screw to mount the L-1 & L-2 form inside the L-3 & L-4 form. They also had the volume control mis-wired.

I found a coil in my parts collection, removed the wire, put it on the original form, and coated it with some of Rima's nail polish. I need to finish the radio and hope the valves are good to be able to test it. L-1 is untuned, so it should work.

https://i269.photobucket.com/albums/...as%20found.jpg

https://i269.photobucket.com/albums/...ransformer.jpg

https://i269.photobucket.com/albums/...as%20found.jpg
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Old 18th Jul 2019, 5:08 pm   #5
FStephenMasek
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Default Re: F. Stephen Masek's Bush SAC21 restoration

I have finished replacing the resistors and capacitors. All of the tubes/valves have good filaments, and the audio works with a CD player connected across the volume control. I suspect that the RF and IF adjustments are way off, so now need to work backwards from the audio output to check and adjust it.
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Old 19th Jul 2019, 12:50 am   #6
FStephenMasek
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Default Re: F. Stephen Masek's Bush SAC21 restoration

She is working and sounding loud! The RF and IF adjustments were way off, and I found one intermittent connection at the band switch I'd failed to solder.... I still need to adjust / align it, replace the dial string, and replace the grille cloth. I'm delighted that the tubes/valves are all good enough for it to work well.

https://i269.photobucket.com/albums/...image001_3.jpg

https://i269.photobucket.com/albums/...image002_3.jpg

https://i269.photobucket.com/albums/...image003_1.jpg
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Old Today, 12:57 pm   #7
MurphyNut
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Default Re: F. Stephen Masek's Bush SAC21 restoration

That's a very thorough restoration going on there and I'm enjoying seeing the progress.
I think these sets are very robust my SAC 31 (the same as your apart from the cabinet) is working extremely well despite decades unloved in someones loft.
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