[Amps] Dentron 160-10L 10 meter issue

[Carl]

Id check to see if it even has 10M enabled and FL-1 removed or bypassed.

Carl
KM1H


----- Original Message ----- 
From: "Tim Kass" <k8wbl at yahoo.com>
To: <amps at contesting.com>
Sent: Thursday, September 06, 2012 8:57 AM
Subject: [Amps] Dentron 160-10L 10 meter issue


Hey Group,

Well, finally got around to completing the project I bought a year ago...the 
amp had blown diodes. I replaced all the diodes, put in a circuit board for 
the new caps, upgraded the 811A's to new 572B's, put in a 6" inch fan, new 
circuit breaker and new, heavier, RF choke with suppressor kit (Ameritrons 
kit) ..works well except when I tried it on 10 meters last night...SWR 
infinite....was this one of those amps that Dentron put in the block for the 
10 meter band so the Childrens Band folks dont try to use it? Seems like its 
a dead short...simple to open it back up again but also thought maybe it 
could be parasitics, etc...the manual states in capital letters to have the 
amp load and tune positions set to their specifications before attempting to 
transmit. I know Dentrons had issues with parasitics, reason for the new RF 
choke and top mounted suppressor kit... any thoughts? Carl? Just like to 
hear any suggestions or experiences before I open it
 back up again ... also..case is removed at it was shorting out to the top 
of the case on 20 meters, poor Dentron design to have any metal THAT close 
to the top of the main coil...probably what blew it up in the first 
place..guy told me he was operating it on 20 meters CW when it blew.

73, Tim K8WBL
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