Amps
[Top] [All Lists]

Re: [Amps] HV Divider

To: "Ian White GM3SEK" <gm3sek@ifwtech.co.uk>, <amps@contesting.com>
Subject: Re: [Amps] HV Divider
From: "KB0NLY" <kb0nly@mchsi.com>
Date: Sun, 1 Mar 2009 14:43:31 -0600
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Ian,

Thanks for explaining that further.  That formula is what I was looking 
for..

2380V x 50k / (10M + 50k) = 11.84V

I like to "know" how this stuff works, only way i can learn it for future 
use!

The B- is closely tied to chassis now, a new 1k 12w wirewound vitreous 
enamel resistor is in place.  The previous one evidently failed sometime 
between testing the amp on HF and starting to modify it for 6M.  Perhaps i 
bumped it hard and broke a connection inside either end of it, but its open 
now.

The meter in question, used for checking the output of the divider is my 
trusty old fluke.

The transformer in the FL-2100B has the secondary marked with 850, 620, 425, 
0.  Make sense now?

It turns out it was just that resistor, the B- was above chassis ground due 
to that open resistor.  Another lesson learned!  And don't worry about me 
around HV, i don't fear it, i respect it, to me thats more.  I have worked 
around higher voltages then this.

73,

Scott KBØNLY


_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps

<Prev in Thread] Current Thread [Next in Thread>