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[VHFcontesting] 2M SSPA

To: "'VHF Contesting Reflector'" <vhfcontesting@contesting.com>, "'Nick Mohr'" <kc2vwi@gmail.com>, "'Murphy Walt'" <n2wm@nj.net>, "'Howard Crawford WD3R'" <Howard.Crawford@exeloncorp.com>, "'Niel Melendy'" <nemsr@warwick.net>, "'tomguff'" <tomguff@embarqmail.com>, "'Ron DeBlock'" <rdeblock@att.net>, "'Robert Mohr'" <robert.w.mohr@gmail.com>
Subject: [VHFcontesting] 2M SSPA
From: "John Santillo" <u1004467@warwick.net>
Date: Tue, 5 Feb 2013 22:19:57 -0500
List-post: <vhfcontesting@contesting.com">mailto:vhfcontesting@contesting.com>


Here is a quick update to the SSPA.  I will give specific details if you


*       The overheating problem has been resolved after I re-built the
output matching section
*       I added additional cooling
*       Installed the KC2VWI bulk-head connector for the control line

*       A 40 foot control line will need to be made out of rotor cable and
shielded twisted pair.  

*       The Controller and Low Pass Filter (LPF)/Directional Coupler (DC)
have been integrated
*       Thermistor for thermal cutoff has been added (just in case)

*       This is not N2IEL's real-time temperature sensor.  That is need too.

*       The arcing in the LPF has been resolved.
*       The new high power 50V supply doesn't even break a sweet.
*       With 3W in I'm getting 1000W out and that's after the LPF/DC losses.

*       What's next

*       I want to run one more thermal check with the new fan installed.  I
expect major improvement
*       Finish up the controller wiring.
*       Add the 12 to 28Vdc Boost Regulator (3Amp version I found on eBay
for $10.made in China of course.)
*       After this its transverter and radio integration time







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