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Messages - ALDesigns

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1
Tube Consoles / Re: Magnavox 64-01-00 hum balance replacement
« on: October 08, 2018, 05:18:54 AM »
Fantastic!
I will start looking into it in the next few days, weekends are usually when I can put hands on it. I will pull voltages as well, I have been taking notes and will relay any pertinent info.
Thank you very much!

2
Tube Consoles / Re: Magnavox 64-01-00 hum balance replacement
« on: October 07, 2018, 08:02:08 PM »
Thanks!
Here it goes.
Needed all the tubes so I got NOS matched pairs and quads. Replaced all wax caps with polypropylene caps of equal rating and higher voltage. Ecaps and cans have been replaced. Eveything was cleaned and solder joints were checked. The T2, bass output chnl 1, was sizzling and bubbling so I disconeccted it to see how the recap and new tubes would do. Everything sounded  great except minus the bass on chnl 1. Heavy hum even when the volume was down once it was nice and warm. Ordered a replacement transformer, NOS Merit A-2905 which I installed according to specs, blue and brown to plates and red to B+. The Merit however has a red blue and green, I connected green as if it were brown, unsure of colors since they have faded. Now I get great sound for about 2 minutes and the sound drops to a very low level and sounds tinny. I have rechecked all the tubes on my recapped mighty mite II, they all checked out. The unit has not had a chance to warm up enough with sound to tell about the hum balance since the new merit went in. I checked the sound dropping out on the phonograph, fm and am, and an auxillary in line from an ipod, same thing.
My tubes are all closely matched and before the new merit went in the hum balance dis nothing audible when adjusted.

3
Tube Consoles / Magnavox 64-01-00 hum balance replacement
« on: October 05, 2018, 04:09:59 PM »
The hum balance pot has no effects if turned. It has a single wire attached and is soldered to the chassis, the service manual said a clarostat 39-200 would replace it. I bought one but it has 4 pins that look to be soldered to the chasis all pointing down. Does anyone have any advice on how to replace the original?
Thanks,
Aaron

4
Solid State Consoles / Re: Magnavox 1971 Astrosonic 2P3763
« on: September 24, 2018, 03:30:00 PM »
Where dis you get the service manual for the R231?
Thanks!
Aaron

5
Solid State Consoles / Astro Sonic Service Manual Chassis R231-01-BA
« on: September 24, 2018, 03:25:26 PM »
Hello!
I have been looking and looking for this model and have had no luck anywhere.
Magnavox Astro Sonic
The Model is 1P3762 Run 2
Chassis is R231-01-BA
I have seen only 1 link for it on shedradios.com which seems to be closed.
Any help is greatly appreciated!
Thanks
Aaron

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