[Amps] [BULK] - Re: SB200 loading problem

[Steve Katz]

It's not normal for the LOAD cap to be fully meshed on any band when
operated into a 50 Ohm load.  On 80m, a 500pF (I think) padder is switched
in parallel with the tunable LOAD capacitor, but it's not in the circuit on
40m or the higher bands.  If that cap were missing or bad (or the switch
wasn't making contact in that position), that could explain why the LOAD cap
needs to be fully meshed on 80m, but it wouldn't explain 40m...-WB2WIK/6  

-----Original Message-----
From: John Parkins [mailto:kvp at bigfoot.com]
Sent: Monday, September 19, 2005 2:19 PM
To: amps at contesting.com
Subject: [BULK] - Re: [Amps] SB200 loading problem


Hello Stan,

Yes I have tried it into a dummy load and the loading is the same. I
run resonant antennas on both 80 & 40 so I don't think that's the
problem either.


Monday, September 19, 2005, 10:04:25 PM, you wrote:

SS> Did you try it into a 50 ohm dummy load and see if you got the same
results?
SS> If it works on the dummy load, then check the antennas with an analyzer
and
SS> see what they look like.

SS> Stan

SS> ----- Original Message ----- 
SS> From: "John Parkins" <kvp at bigfoot.com>
SS> To: "Amps Listserver (contesting.com)" <amps at contesting.com>
SS> Sent: Monday, September 19, 2005 3:34 PM
SS> Subject: [Amps] SB200 loading problem


>> Hello All,
>>
>> The loading control on my SB200 is hard over anti-clockwise, i.e. max
>> capacity on both 80&40 so I can't ever tune through a peak as such.
>> Any ideas why this might be or what I can do to to get round the
>> problem?
>>
>> I wonder if another user could let me know where their control is set
>> for these two bands mainly to see if this is a general problem.
>>
>>
>>
>> -- 
>> Best regards,
>> John G8KVP                         mailto:kvp at bigfoot.com
>>
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>> 




-- 
Best regards,
 John                            mailto:kvp at bigfoot.com

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