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[Closed] Defiant MSH755 Radio.

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malcscott
(@malcscott)
Posts: 1566
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Topic starter
 

Hi, looking for a cct diag for a Defiant MSH755 radio, Cheers Malc.

 
Posted : 19/10/2019 9:53 am
crustytv
(@crustytv)
Posts: 11869
Vrat Founder Admin
 

Yes I have it, I will get it scanned and uploaded within the next 15 mins, I will notify here when it available in the members library.

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Posted : 19/10/2019 9:58 am
crustytv
(@crustytv)
Posts: 11869
Vrat Founder Admin
 

Well it took 12 mins not 15 ?

Circuit data covering Defiant models - MSH556, 356,755, RGSH656, 756, TRGSH156 can now be downloaded from the members data library.

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Posted : 19/10/2019 10:10 am
malcscott
(@malcscott)
Posts: 1566
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@crustytv

Thank you, first class service.

 
Posted : 19/10/2019 10:18 am
Nuvistor
(@nuvistor)
Posts: 4607
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I have just downloaded the circuit, a decent specification radio, push pull output, presume EL84’s and ECC83 phase splitter and negative feedback triode amplifier.

One thing I don’t remember seeing before is the IF transformers are switched between AM and FM, the switch will have HT on it so something to watch for breakdown.

Look forward to the repair/restore thread. 

 

Frank

 
Posted : 19/10/2019 1:08 pm
malcscott
(@malcscott)
Posts: 1566
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Topic starter
 

Hi, only a couple of wax caps in this set. The rest of them are disc type. Are these type reliable or should i replace them? Malc.

 
Posted : 20/10/2019 2:05 pm
Nuvistor
(@nuvistor)
Posts: 4607
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If they are disc ceramics they are very often ok, I would only replace is proved faulty.

If you post a photo, we may be able to confirm.

 

Frank

 
Posted : 20/10/2019 5:44 pm
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