[Amps] Ameritron AL-800

[Steve Bookout, NR4M]

Have you given any thought to converting to some of the Russian tubes.  
Would justhave to be an easier rebuild than converting to LDMOSFET’s. And, when I last looked those tubes are still less expensive than ‘Merican alternatives. 

Steve NR4M 

Sent from my iPhone

> On Dec 9, 2025, at 6:03 AM, Douglas L via Amps <amps at contesting.com> wrote:
> 
> I wouldn’t say that using an LDMOSFET is a retrofit.
> It would basically mean building an entirely different amplifier with a different power supply, different input and output networks, etc.
> 
>> On Dec 9, 2025, at 5:32 AM, Steve Thompson via Amps <amps at contesting.com> wrote:
>> 
>> https://www.ampleon.com/products/extremely-rugged/75-v/ART4K0FX.html
>> 
>> But not the easiest retrofit 🙂
>> 
>> Steve G8GSQ
>> 
>>>> On 09/12/2025 08:37, Douglas L via Amps wrote:
>>> Has anyone created a work around to replace the 3CX800A7 tubes in the AL-800, the AL800H, Alpha, Ten-Tec and other amps that used this tube?
>>> Eimac versions are greater than $1500 and the Chinese subs, last I looked, were pushing toward $1000/tube. Machlett, Penta and the like are simply rebranded Chinese tubes.
>>> Medical pulls have largely dried up with MRI and other machines going solid state.
>>> Thus the tube pricing has gotten ridiculous.
>>>  Perhaps the only answer is going to solid state amps?
>>> 73,
>>> DougWA1TUT
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