[Heathkit] SB-200 10M Power Output

[Tom Chesek]

Carl,

I've thought about the tubes and my thoughts are the same as yours, but I do 
have an SB-201 that I can pull another tube set from to try. As far as the 
MFJ...I see the same results on the FT-450 meter so I didn't take it any 
farther. I could tweak the input on 15 Meters with more drive but the 10 
meter slug is stuck and I'm hesitant to try to get it loose. Having said 
that I am open to all suggestions and am willing to try them try them all.

Thanks,
Tom

----- Original Message ----- 
From: "Carl" <km1h at jeremy.mv.com>
To: "Tom Chesek" <tchesek at epix.net>; <heathkit at mailman.qth.net>
Sent: Wednesday, September 17, 2008 7:58 PM
Subject: Re: [Heathkit] SB-200 10M Power Output


> "What am I  missing here?"
>
> Good tubes maybe. But I wouldnt expect that dramatic a drop between 20
> and 15M.
>
> Start by putting the MFJ in a box in a dark closet. Then run the FT-450
> at 30-50W and align the coils properly.
>
> Carl
> KM1H
>
>
>
> ----- Original Message ----- 
> From: "Tom Chesek" <tchesek at epix.net>
> To: <heathkit at mailman.qth.net>
> Sent: Wednesday, September 17, 2008 5:41 PM
> Subject: Re: [Heathkit] SB-200 10M Power Output
>
>
>>I saw this message thread a few days ago and it got my interest. My
>>SB-200 has full power out (550-600W) on 84/40/20 with 100W input but on
>>15/10 both will only do around 160W out with 100W in. I've made sure
>>that all connections are tight. I've cleaned the bandswich and verified
>>that there is good wiping action on each contact. I've used my MFJ-259B
>>to check/set the SWR on the input coils with power on and the relay
>>energized and have an swr of around 1.7 on 15 meters and 1.7 in the
>>middle of the 10 meter band. These readings are confirmed by my Yaesu
>>FT-450 built in SWR meter. What am I missing here?
>>
>> Tom K3TVC