I recently purchased an early (Pre MFJ) inoperable Ameritron AL1200 amplifier realizing full well that it was extensively modified with components and circuit alterations that would be difficult to decipher. Hopefully, there's someone out there that can identify the two part component board depicted in the digital before I remove it. The PC board appears to be professionally etched. There is no antenna changeover relay and the large black coax wire in the foreground connects directly from the pi-net output to the antenna output SO239. Lots of cut wires and no recognizable method for bias control. I would cautiously assume that this is some method of pin diode control. The amp is not functioning for a variety of reasons so it's impossible to assess if this circuit was working or simply a failed attempt at some modification. All the mods appears to be in the antenna changeover circuit Any comments would be appreciated. Ron W2CQM/3 http://Swap.qth.com/segamida/537719.jpg 




________________________________________________________________________
Try Juno Platinum for Free! Then, only $9.95/month!
Unlimited Internet Access with 1GB of Email Storage.
Visit http://www.juno.com/value to sign up today!