Amps
[Top] [All Lists]

[Amps] 160 efficiency problem

To: <amps@contesting.com>
Subject: [Amps] 160 efficiency problem
From: 2 at vc.net (2)
Date: Wed May 21 09:15:22 2003
>N3300   3 amps @1mhz      400pf   quantity 4     7.5kv
>
?  Tnx.  This type of dielectric is not rated for tuned circuit applications, 
however it works ok for bypass and coupling applications.  For 1.8MHz padders, 
2000v mica caps are good.  See Cornell-Dublier Web site for the nitty gritty.

cheerz
>
>Lynn   NO9Z
>
>
>
>2 wrote:
>
>> >Hello,
>> >
>> >    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) ,
>>
>> ?  Please describe padder caps and give RF current rating at 1MHz.  tnx
>>
>> >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@contesting.com
>> >http://lists.contesting.com/mailman/listinfo/amps
>>
>> Rich, AG6K, 805-386-3734, www.vcnet.com/measures
>
>


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


<Prev in Thread] Current Thread [Next in Thread>