The AM Forum
December 13, 2025, 04:54:01 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Alpha 99 amplifier  (Read 1379 times)
0 Members and 1 Guest are viewing this topic.
K8DI
Contributing
Member
*
Offline Offline

Posts: 466


« on: September 05, 2025, 02:54:07 PM »

Hello to the folks with more knowledge on this than I...

It came from an estate, I need to assign a value to it and decide what to do with it. Low serial number, so older amp, approx. 2002.

Alpha 99 model, manually tuned linear, legal limit, a pair of 4cx800a. Seems complete and in good physical shape, was owned by a ham with several houses who as far as I can tell carted his radios between them but left the amps and antennas in place. He's been dead for 5 years and likely off the air a couple before that, so it hasn't been used, and I am not going to just power it up...

So, sight unseen, guess on value?

So, what should I look at before applying power, besides power supply caps? These amps known for anything in particular?

Ed
Logged

Ed, K8DI, warming the air with RF, and working on lighting the shack with thoriated tungsten and mercury vapor...
W1ITT
Member

Offline Offline

Posts: 600


« Reply #1 on: September 06, 2025, 04:46:36 PM »

The tubes, or a Russian substitute, seem to be going around $350 or more apiece, so the buyer is taking a chance on how good the existing ones are.  I think I've seen a couple A-99s in the $1000-$1200 range in the last year or so but that was asking price.  I like my Alpha 78 but probably wouldn't want to spring for more than $1K if I wanted another. The HV caps are close to half a century old now.
I recapped my 78 and had some new tubes for it already but it was more a labor of love than good sense.
I like vacuum tubes but there are smarter options these days.  Try for $1K for the 99.

73 de Norm W1ITT
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone © 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.07 seconds with 18 queries.