Mike,
Did you check the bandswitch contacts for these two frequencies? Do you have a
seperate input match for each frequency that's switched?
Best,
Will
*********** REPLY SEPARATOR ***********
On 7/2/06 at 11:45 PM Mike wrote:
>Hello,
>
>Having an issue with a homemade GS35B operationon 15 and 17 m. When
>keyed, the power seems to hesitate before going up to 1.5 KW
>output. CW is a mess on these bands due to this situation. On RTTY
>the power hesitation is so short that it doesn't present a
>problem. Amp. seems to be okay to about 1200 W, but the hesitation
>returns above this level. Other bands, 10, 20, 40, 80, 160 work okay.
>
>Using a TIP147 transistor in a bias circuit similar to Ian's Triode
>Board bias circuit. Cut-off bias is provided by a 10 KOhm resistor.
>
>The filament choke is ~25 bifilar turns of #16 on a 10"X1"X1/4"
>oblong ferrite rod. An additional choke of 20 turns #20 on a ferrite
>rod, 3.5" long and 3/8" dia., is in the line from the filament
>secondary center tap to the bias circuit.
>
>This a strange situation as seen on 17 and 15 meters using either an
>antenna or a dummy load. On the other bands, the power smoothly
>rises to full output.
>
>Any ideas on how to fix this situation are appreciated.
>
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