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August 19, 2009

Comments

Ed S.

Hey guys, I have a defective 320 available for parts. The side lamp is out, but the tuning pointer light is lit. The display works, the tuning mechanism is unstrung. The sound has hum and some distortion. All buttons and knobs are present and functioning. Could possibly be repaired if someone has a service manual. Would sell for $15 plus shipping from California.

AL PUGLIESE

Hi Mike...My 320 radio don't shut off. The switch when held down shuts it off, but when released the radio comes back on...Is this the off switch problem or circuit problem? Any help appreciated...AL

Jim S.

Still have my Proton 320. I bought new. Repaired it many times including momentary contact switches and of course the tune lamp 3-4 times. Don't drop it! I did and it's now held together partially with clear packing tape. I should replace it with a non-string tuned digital radio.

Chris

I need some help from those who know the Proton 320 well and have repaired them etc. Let me know if you can help.
I have two 320's and want to make one of them portable ( the one that is a little beat up).

I want to mount it on a piece of cherry wood, add a battery, install a dual voltage switch and use it outside or where ever I am working. (similar to a Kloss PAL)

I have opened the case on my oldest one several times to fix the antenna and the 9 volt back up.
and this is the extent of my knowledge of the innards.

1. Where is the best place in the circuit to tap into the existing power supply circuit to add my battery and dual voltage switch?

2. Can you recommend a battery to use that will run this radio for 8 hrs with out a change?

Bottom line is this is a great radio and I don't want to buy a poor quality portable radio. I don't mind making the modifications.

Thanks for your help!
Chris

Tim

After 27 years of loyal service, I'm sadly cleaning and packing my beloved 320 away for storage. The clock and alarm still work perfectly, but the radio tuner and volume dial just bring lots of static and occasional blaring sound. The light behind the dial burned out decades ago. I hope to find a resource to get it fully restored one day and bring it back into service. In the meantime, its temporary replacement (for maybe only 10 or 20 years) is a Tangent Quattro MKII WiFi Table Radio which has more bells and whistles than I can figure out -- but I said the same of the Proton when I first brought it home in 1984. I look forward to the Proton's return!

Tim

After 27 years of loyal service, I'm sadly cleaning and packing my beloved 320 away for storage. The clock and alarm still work perfectly, but the radio tuner and volume dial just bring lots of static and occasional blaring sound. The light behind the dial burned out decades ago. I hope to find a resource to get it fully restored one day and bring it back into service. In the meantime, its temporary replacement (for maybe only 10 or 20 years) is a Tangent Quattro MKII WiFi Table Radio which ahs more bells and whistles than I can figure out -- but I said the same of the Proton when I first brought it home in 1984. I look forward to the Proton's return!

Ed S.

Tim,
The cost to get your 320 repaired would be more than buying another 320 in good working condition on ebay, where they generally sell for 40-60 dollars.
(Just my guess, but it sounds like the Volume potentiometer is worn out (worst case), or at best just needs some contact cleaner.)

Dr. Kevin Marsico

I PURCHASED ONE OF THESE MODEL CLOCK/RADIOS BACK IN THE VERY EARLY 90's. PROBABLY FROM CRUTCHFIELD OR SOMEPLACE LABELING IT AS THE "BEST." IT HAS PERFORMED FLAWLESSLY ON A DAILY BASIS SINCE. SAVE FOR ON INCIDENT WHERE THE TUNING NEEDLE BULB HAD BLOWN OUT. I HAVE AN ELECTRICAL ASSY. DEPT. WHERE I WORK & BROUGHT IT IN TO THE GUYS IN THERE FOR A BIT OF SURGERY. THE BULB WAS RESTORED & READY TO SERVE ANOTHER 20 YEARS! THE PROTON 320 WAS ONE OF THE SMARTEST OF THE "UNEEDED" PURCHASES I'VE EVER MADE. USED DAILY, KEEPS FLAWLESS TIME, W/ DUEL ALARMS AS A BACKUP NOW THAT THE WOMAN WHO CRITISIZED MY PURCHASE AS FRIVOLOUS @ THE TIME, HAD NOW PROVEN TO HAVE OUT-LASTED HER!
-INSPECTOR M.

Ed S.

Dr Kevin. Thanks for the great testimonial... It makes me feel that the effort I put into making Proton get its quality act together did not go for naught!

Eliot M. Gelwan

The light on my Proton 320 tuning dial has not failed in 31 years.

Jim

has anyone dealt with the problem of one alarm functioning but not the second? Alarm switch #1 is the apparent affected part. Anyone repairing the 320 wish to have some business?

Mark

I have a 320 that I bought 20-30 years ago. Still use it today and love it! The best part of all is the ramp up alarm volume... I hope this thing lasts forever because I doubt I'll ever find anything to match it.

Don Vinton

I bought my 320, new, back in the 80's. It's still on my nightstand, use it nearly every day, wouldn't replace it for anything!

Sam

This thread has been quiet for a while but here goes -

Has anyone opened their Proton 320 clock radio case (after it has been plugged in a while) and found the transformer inside uncomfortably warm?

I have two of these radios, and in each the transformer gets very warm, almost hot. I know transformers by their nature heat up, and the heat can vary based on load and ventilation. One of my Protons has been plugged in for the past two years, and hasn't burned the house down yet, so it seems safe. The transformers do not smell burned out.

The transformer is engraved with "29-2096-4" and "A1(H)-036-2-48-F". Stamped in ink is "8810", perhaps a date code. Engraved on the side of the transformer is "Federal". The part number according to Proton is "XMFR PW E1-48 120V UL" The transformer has six wires on the secondary: two blue, 2 white, 1 brown, 1 black.

Removing the transformer from the radio and testing with a voltmeter yields:
blue-blue 36.7 vAC,
white-white 3.0 vAC,
brown-blue 18.2vAC, and
black-white 1.3vAC.

The circuit board on each of my two radios is discolored from heat around resistor 807 (the interior parts are labelled). I have replaced that resistor with a 1/2 watt version, and installed it so it sits a little above the circuit board for ventilation (it still gets warm). I also replaced the main filter capacitor, an electrolytic rated 25v.

Any thoughts on the transformer? Does it sound normal to operate like that? Is is normal to have a resistor so warm that it discolors the pcb? I've delayed buttoning up the unit until I feel comfortable that everything is operating normally.

And, based on the voltage readings, can anyone ID a suitable replacement for the transformer?

Gregory George

Mine was given to me about 25 years ago for helping a friend to move. Best clock radio on the market. If and when it brakes, the only replacement will be a Bose clock radio. Greg

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