[Amps] Alpha 87a Low receive

[Robert Arenella]

On 6/13/2016 6:03 PM, Jerry wrote:
> The TX and RX pin diodes have been remarkably reliable with infrequent
> failure.

   I'll stick with my statement that pin diodes were / are the Achilles 
Heel of all the Alpha Amps that used them, especially the 86. If they 
were so reliable, why did Alpha design & build a replacement T/R board 
for the 86 that used vacuum relay switching?  Why did 86 owners buy 
EVERY ONE that Alpha made?  They were not cheap, about $450 each.

   The pair of those Tx pins could handle about 20 watts of reflected 
power.  My 86 trips at about 2:1 SWR.  Do the math.  At the legal limit, 
that's WAY more than 20 watts of reflected power.  P-O-O-F!


73,
Bob
N2OAM