[UK-CONTEST] FT1kMP zapped
G3SJJ
g3sjj at btinternet.com
Sat Dec 9 07:17:54 EST 2006
Thanks Paul. I think they would be C1071 and D1033 in the MP. Chatting
with don G3BJ, he has used MPs in the same operating position before and
not had a porblem, he also felt my MP might have been low already. Need
some more investigation before I attempt any repairs.
Currently hearing OM3CGN at s6 to s9 on 28011.5. Heard ZC4LI, YM and
DL1AIO but none moved the S meter. Difficult to know under present bnad
condx.
Chris G3SJJ
Paul Beecham wrote:
> Hi Chris,
> Sorry to hear about your MP.
> Not sure if the rf unit in the MP is the same as the mk 5 but before
> I had proper filters I used to regulary zapp my mk5. front end.
> Components C1232 (0.1uf 25v chip cap.) and (D1056 1sv271 tph3 diode) ,
> were always the culprits, the latter more so. These components are in
> the rx chain just before the band pass filters. They are chip
> components and difficult to solder but with care it's do- able in
> about 45 minutes start to finish, I hope this is of some help.
> 73
> Paul
> G6PZ.
>
>
> ----- Original Message ----- From: "G3SJJ" <g3sjj at btinternet.com>
> To: "UK Contest Reflector" <uk-contest at contesting.com>
> Sent: Saturday, December 09, 2006 9:49 AM
> Subject: [UK-CONTEST] FT1kMP zapped
>
>
>> Looks as though we may have zapped the front-end of my FT1kMP during
>> CQWW CW. Overall gain seems well down. On 160m my normal noise level in
>> dry conditions is around s5, currently the s meter is showing s2.
>> Likewise on 10m, given the Space weather situation, I can hear a few
>> signals but generally they are much lower and also white noise is low.
>>
>> Unfortunately I don't have sig genny so can't do any accurate
>> measurements. Can anyone suggest what components might have gone first?
>>
>> Chris G3SJJ
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>> UK-Contest at contesting.com
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>
>
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