[Amps] Dentron ML2500 on 50MHz

[Radioal]

Actually, the 8875 tubes are no longer available.  I built a 6-meter amp 
with a pair of 8875s years ago, using Dentron MLA2500 components when they 
were available fairly cheap from Dentron.  So, your project is just like 
mine - except mine didn't look like the MLA-2500!

I added a simple tuned input circuit for impedance matching - and used a 
simple pi-network for output. The tubes perform well at 50 MHz, and 1000 
watts out is normal with good air flow for cooling those transverse-cooled 
8875s.  I would start by gutting the bandswitched pi network and installing 
new components for six meters only, including winding a new plate RF choke.

Be careful to watch the grid current (same as the stock MLA-2500 warning).

Have fun!  There are several Russian tube conversions available for the 
MLA-2500, but all conversions require extensive air ducting changes.

Al - K8EUR
----- Original Message ----- 
From: "Adrian Rees (M1LCR)" <rees.a at btconnect.com>
Cc: "'AMPS'" <amps at contesting.com>
Sent: Tuesday, April 05, 2005 4:47 PM
Subject: [Amps] Dentron ML2500 on 50MHz


> Does anyone know if a Dentron ML2500 has been converted or is capable of
> being converted for 50MHz operation ?
>
> Thanks
>
> Adrian Rees (M1LCR)
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>