[Amps] FW: Transformer Question

[Robert]

Checked 1983 ARRL Handbook & it shows the 811 tubes with max voltage 1500vdc

The power supply choke provides some voltage stabilization
The non-choke PS are popular => cheaper to make, Less weight, Less cost to
ship, etc...

Filament - you're right at the rating, works but warm winding.... (Ask'um
what temperature rise is at 16A)

73 W5AJ
Robert

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of
maflukey at gmail.com
Sent: Thursday, February 27, 2020 1:12 PM
To: amps at contesting.com
Subject: [Amps] FW: Transformer Question

Thanks, you are correct.   So 210 / 4 = 52.5 uF for the 811H.

 

Matt

KM5VI

 

 

From: gudguyham at aol.com <gudguyham at aol.com> 
Sent: Thursday, February 27, 2020 11:10 AM
To: maflukey at gmail.com
Subject: Re: [Amps] Transformer Question

 

The 811h has 4 filter caps 

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Get the new AOL app: mail.mobile.aol.com <http://mail.mobile.aol.com> 

 

On Thursday, February 27, 2020, Matt <maflukey at gmail.com
<mailto:maflukey at gmail.com> > wrote: 

 

...  100uF / 5 = 20 uF.    811H is 120 / 6 = 20uf.  So both are the same,
the 811H caps just have some additional voltage headroom.

Matt
KM5VI




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