[Amps] HV Diodes

Jim Thomson jim.thom at telus.net
Fri Oct 17 09:13:43 EDT 2014

Date: Fri, 17 Oct 2014 18:14:47 +0800
From: "Hsu" <hsu4qro at gmail.com>
To: "Louis Parascondola" <gudguyham at aol.com>
Cc: amps at contesting.com
Subject: Re: [Amps] HV Diodes

Why  one  3CX3000A7  amp?

##  why not?   If the 3CX-3000F7 is used, then NO socket is required. 
If one requires more power, like 8-15 kw out, then use the slightly bigger 3CX-6000A7. 
The YC-243 version is just a socketless 3CX-6000A7.  
Both tubes have a 225w CCS grid diss rating..and more with grid bonded to chassis.
You can use the grid for a dummy load for a FT-1000D.
Both have a 50 ohm input, and low IMD.  You don’t require a parasitic suppressor on 
either of em.   I wouldn’t mess with a roller inductor.  A dual wafer model 85 or 88 switch
works great for the 3x3.   The 3x6 needs 3 wafers in parallel. 
Both are very cost effective tubes.  IE: huge bang for the $. 

Jim   VE7RF

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