Date: Thu, 30 Sep 2010 21:35:07 -0400
From: "Kevin Adam" <n9iww@msn.com>
Subject: Re: [Amps] Any experiences with "powergridtube"? (YC156 hunt)
To: <dezrat1242@yahoo.com>, "AMPS" <amps@contesting.com>
Message-ID: <SNT131-ds132866D9026A16F592B8CBFB690@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
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