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SAPPHIRE IV AM/FM 6V RADIO tested good Turn on always show all large photos     Ad id: 2438429
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LOOKS GREAT WORKS GREAT
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GLASS BLASTED COVER
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Upgraded power transistor
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SAPPHIRE IV AM/FM 6V RADIO tested good   Price: $395
Great looking AM/FM Sapphire IV 6V Radio Working.
This is a great original 1966 Sapphire IV AM FM 6V radio. The radio has new output power transistors and has been tested the radio & the light works fine. It receives stations in both AM and FM.

I will convert the radio to 12V for an additional $95.00.

GERMANIUM POWER TRANSISTOR THERMAL RUNAWAY
Sapphire radios use Germanium power output transistors. The problem with increasing temperature causing increasing transistor collector current is that more current increase the power dissipated by the transistor which, in turn, increases its temperature. This self degrading cycle is known as thermal run away, which will destroy the transistor. The leakage current problem found in Sapphire radios Germanium power transistors is a common cause of many failures.
I use new 2N176 Germanium power transistors, which has less than 0.003A leakage specification. I have repaired many Sapphire radios with power transistors that had over 0.3A and some even higher. Output power transistor failure may damage internal parts, which are no longer available.


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https://youtu.be/WNXxeQi_kGs
https://youtu.be/npjtHuNhFJo

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Contact: Wayne at 408 396-0676 in Gilroy, CA
Shipping and packing insured: $19 in USA, I accept US Postal money orders from USA buyers and Western Union from international buyers.
I DO NOT accept PayPal.

I answer all emails, but some emails are blocked; CALL ME if you donít receive a response in 24 hours.
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Wayne S. Johnson
Wayne Johnson
April 12, 2006
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Gilroy, California, USA Map it
Mon Dec 21, 2020 4:15 pm
Wed Jun 09, 2021 9:41 am
Sat Jun 12, 2021 12:15 pm
334
Parts - General Parts
Cash
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