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September 7th 03, 04:46 PM
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Tom Tillander wrote:
My Kenwood TS440S is beginning to present symptoms (frequency drift and intermittent dots in the display) of PLL unlock. Service Bulletins at Kenwood.net suggest that replacing a fist full of diodes with new diodes of any of these types : 1S2588,1SS91S, BA282 will cure the problem. Additionally, I have heard that 1S1587 diodes can be used. However, I have been unable to find a source for these parts that will send or sell me just a fist full. I haven't tracked down the manufactures of all the parts. However, the BA282 seem to be made by Vishay. Can any of you recommend a supplier for any of these parts? Thanks Frequency drift is probably not the diodes. There have been problems with one of the voltage controlled oscillators. The only problem I know of with the diodes is when one band goes bad. I sent my TS-440s in for repair and they replaced a few components (not diodes) and it has been OK for a few years now. Bill K7NOM |
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