>Sounds like output coupling is not happening, if grid current is
>higher on 160 and output is lower. Calculate the reactance of your
>blocker capacitor, for one thing. I get about 49 ohms at 1.8 MHz,
>which is excessive.
** In a 2000-ohms or so circuit, 49 reactive ohms is hardly significant,
John.
>One ususally sees about 10 x this value of
>capacitance as an anode blocker for high power at 1-2 MHz.
>
>73
>K5PRO
>John
>
>
>
>>I am almost finished with the new homebrew yc156 amp.
>>It works fine on 15 - 80 meters but I am having a problem with
>>160.
>>
>> With 5000 watts in, I am getting about 1200 watts out.
>>
>> I have added inductance to the plate and cathode chokes, changed
>>(padder caps for the load to 400 pf/ 7.5kv) , and setup the tank
>>several
>>times. The blocking cap is a 1900 pf .
>>
>> THe other sympton is that grid current is much higher on 160 than
>>all the other bands.
>>
>>what am I missing?
>>
>>TIA for any assistance
>>
>>Lynn NO9Z
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Rich, AG6K, 805-386-3734, www.vcnet.com/measures
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