!500 watts input to a single GI7B. That is going to be awfull hard on the
tube.
----- Original Message -----
From: "KB0NLY" <kb0nly@mchsi.com>
To: <amps@contesting.com>
Sent: Tuesday, March 10, 2009 8:30 AM
Subject: [Amps] Choosing a Plate Transformer
I'm thinking about slowly scrounging parts to build another amp in the
future, it will be a ways off so in no hurry, and i was wondering how one
chooses a plate transformer.
I know the minimum i'm shooting for, 2500v 600mA. This will be to run a
single GI7B.
I was thinking about using those Far Circuit boards for constructing the
doubler and rectifier. It looks like the average factor is 2.8. Which
means for 2500v i would need a transformer with a secondary of at least 893
volts (rounded up). But what should i do on the current capacity side,
should i look for something as high as a 1 amp transformer? Most of the
ones i am finding on eBay for example are 500mA or smaller. I could
probably get away with .500 mA.
The question is, does one loose ampacity with the double circuit, or does
the current remain constant? I can't seem to find any notes in the handbook
articles on the subject of choosing a transformer. This is why the last amp
i built i used a donor FL-2100B so i wouldn't have all the questions on
constructing the power supply. But the next time around i want to build the
power supply from scratch and learn more about HV supplies!
The 6M amp i just built is working great by the way. It will do 500w but i
keep it around 400w. I checked into a net this weekend that a nearby club
holds on 6m, they were suprised how loud i was as i'm usually the most
distant and sometimes one of the weekest for them to hear.
73,
Scott KBØNLY
www.kb0nly.net
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|