[Amps] 160 output problem

[2]

>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
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>


Rich, AG6K, 805-386-3734, www.vcnet.com/measures