|
Title: Watt Meter Replacement Diodes Post by: W8UJX on December 19, 2012, 07:20:32 PM I have a Yaesu YS-500 SWR/Watt meter. The meter covers 140 to 525 MHz. The diodes in the RF pickup section are burned out. The schematic only shows a block for this section and does not give a part number for the diode.
Does anyone have a sugestion for replacement diodes? Thanks, Jerry, W8UJX since 1954 Title: Re: Watt Meter Replacement Diodes Post by: KM1H on December 19, 2012, 09:00:59 PM Likely a matched pair of germanium similar to the 1N60, 1N191, 1N270, etc. A pair of modern Schottky should work and they will have zero leakage and be well matched, 1N5711 is a common one I use everywhere in place of germanium.
Carl Title: Re: Watt Meter Replacement Diodes Post by: Steve - K4HX on December 19, 2012, 09:02:40 PM Did you call Yaesu repair? The diodes in the YS2000 are 1N60s.
Title: Re: Watt Meter Replacement Diodes Post by: W8UJX on December 19, 2012, 10:13:31 PM Why didn't I think about calling Yaesu... I will give the 1N5711 a try and if that doesn't work I will give Yaesu a call.
I need to order some diodes that I can use in broken watt meters and other RF projects. The 1N5711 looks like a good candidate. Thanks, Jerry Title: Re: Watt Meter Replacement Diodes Post by: Steve - K4HX on December 19, 2012, 10:53:49 PM I haven't called them recently but in the past they were very helpful. I was asking for info and parts on much older radios, FT101 and FT102. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
|