STV-4H diode

calman46

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May 9, 2012
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124
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MA
#1
Do these diode get "leaky" ? On a restored SX 980 one diode will bring the idle current to 6mV but other diode it will go down to 20mV. Its the diode I swap them around. I can set the bias and it appears to hold when testing .I wondering if the diode is on verge of failing . No replies at AK . Thanks
 

nakdoc

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May 11, 2011
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Nashville, TN Music City
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highly biased
#2
I just had an STV-3H with one diode shorted internally. The symptom was no bias on that channel. The STV-4H has 4 series connected diodes inside. Rather than leaky, it probably has the same failure as mine.
 

WOPL Sniffer

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Aug 10, 2015
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Arizona
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Screw it
#3
I just had an STV-3H with one diode shorted internally. The symptom was no bias on that channel. The STV-4H has 4 series connected diodes inside. Rather than leaky, it probably has the same failure as mine.

I just installed a new set of STV-3H in a Sansui.... They were toast. The brittle wire on the other one snapped up next to the body..... Hell of an invention eh???
 

laatsch55

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Jan 14, 2011
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Gillette, Wyo.
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Halfbiass...Electron Herder and Backass Woof
#6
Thanks, kinda pricey. The last ones I bought were in Germany 8 years ago for 6 bucks ...the Spec 2 would be grounded without the STV-4H...
 
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