[Amps] Converting Henry 2002A or 2004A to 222 MHz

[skipp isaham]

Hi Mike,
-
I have two of this style amplifier. Both have been moved 
around quite a bit. I've had these amplifiers up to NMR 
Frequencies at ~300Mhz.  So the answer is yes and no. 
I've had these style amplifier well above 224 MHz.  I 
know one is currently set on 170Mhz and I forgot where 
the other is.  But I can find it this weekend in my 
storage and look. 
-
I've found the fly in the soup is the combination of 
mechanical and thermal stability of the tank circuit. 
The heat from even modest keydowns cause the tank to 
detune. Since I'm pulsing them in NMR work, it's not 
that big a deal for me. 
- 
Modification suggestions would include more hardy 
tank parts and an increased size blower. The stock 
henry blower is too small (IMO).    
- 
cheers
skipp 
- 
<k9mk at flash.net> writes:
> Hi Skip,
> 
>    Can you clarify as I missed it in your note but did you 
> successfully push
> your 2002 to 222 MHz?
> 
>
> 73 for now...  Mike


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