Hi Guys
I have had a problem on my Omni VI PA board I lost the driver transistors
(2SC1969) Q1 & Q2, I had to replace the bias regulator components for the
drivers LM825 & MJE520 all of which I have now replaced
However we have a problem in the UK of getting Bona Fida 2SC1969's I bought
2 lots of so called Genuine Mitsubishi Transistors that proved to be fakes
I now have found some unmarked transistors from Grandata which work great at
LF but fall off rapidly I get the full 100w on 80m but only 20w by the time
I get up to 20m and only 5W on 10m
I am told that the 2SC1969 is obsolete and that the replacement is an
ERF2030 which is supposed to be a direct mechanical substitute but not
electrical
Firstly,has anyone in the group had experience of these ERF2030's and if so
what changes need to be made to get them to work
I have found a source for them in the UK but its the same firm that sold me
the fake 2SC1969's
Secondly are there any other devices out there I can use. looking for
suggestions
73 de Gordon G3ZFZ
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