[Amps] Any experiences with "powergridtube"? (YC156 hunt)

[Jim Thomson]

Date: Thu, 30 Sep 2010 21:35:07 -0400
From: "Kevin Adam" <n9iww at msn.com>
Subject: Re: [Amps] Any experiences with "powergridtube"? (YC156 hunt)
To: <dezrat1242 at yahoo.com>, "AMPS" <amps at contesting.com>
Message-ID: <SNT131-ds132866D9026A16F592B8CBFB690 at phx.gbl>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
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Give Tom A call he can do you right and does stand by his tubes 
http://www.wa8wzg.net/
I no I have one of his tubes and works great on 160m
N9IWW

##  The 10m below is well built.  Those CRL-859's /HT-59's are indeed,
big mother's.  They come in 15/20/25 kv, usually you see em in 20 kv. Mine
were all 20 kv.  The smaller HT-57's  are easier to work with, and come in 
10/15 kv.  

http://www.directivesystems.com/YC156.htm


## The YC-156 has been used on all bands from 160-6m.  



## WA8WZG has all his YC-156's  / YC-179's / 8877's/  3CXP-800A7's  tested. 

##  You don't require a suppressor for a YC-156/ YC-179.  I have a friend
in W9 land who has a multiband YC-156, and with a really good tube in it, 
get's 10-12 kw out, with 210 w of drive. [7700 vdc no load, 7200 under load]
 Another friend in W8 land gets 7.5 kw out, with 150w  of drive.  

##  No socket.  Just whack a hole in the chassis and bolt it in.  Some will
opt for a 8-10"  square plate, with the hole + air slots already cut into it.
A slightly smaller square hole cut into chassis, and plate bolted down. 
Hammond makes a torroid fil xfmr  to run the fil. 

##  reid @ Eimac tells me that although it's stated the tube has a 6 min warm up, to
allow a full 8 mins of warm up.   The B+  can be applied  simultaneously  with fil
V.   The tube is cut off on RX anyway.   You just can't draw idle current or apply drive for
8 mins.   Easiest  method is to inhibit the  key line for 8 mins..or use a stop watch ! 

##  If you decide to operate with high B+  and loads of drive,  I would highly reccomend
the use of 7-16 Din connectors.  You have to worry abt everything downstream. If you 
want hi-power qsk, parallel 2 x sped up  gigavac Gh-1's  or  RJ-1A's.  If you want high power bypass
capability, use a GH-1 /Rj1-A  for the input.    IE: 2 x amps, wired nose to tail,  tuned up
on different bands.  If that is done, either a toggle  or rotary switch is wired to the xcvr's
key line.  Output of toggle/rotary is fed to each amp.   That way, only one amp can ever be 
keyed at one time.  

##  don't expect to build this things as a table top amp.  If vac caps are used for both tune and load,
and good turns counters used, you can put it in another room, and ..'dial by the numbers'... and
keep a list of all logged freqs.  Keep the loaded tank  Q  low... like 8-10 max.  Then it will  cover a huge
chunk of a band, with out retuning..like the entire 20m phone band, etc. 

later.. Jim   VE7RF