I have a transformer I want to use for a 6v6 build but I am afraid my voltages will be off.  The transformer is a weber w022798.  I see 120/125v primary and 330-0-330 sec taps.  Trick is I want to use a SS recto as I plan to use the 5v tap for relays.  My math has me around 450-465v on the plates with the 120v tap.  I want to be around 400 incase I ever use older glass.  Here are the options I've compiled to drop my B+1;
- Zener center tap
- Use 125v primary over 120v
- 25w power resistor post rectifier / pre plates
Link to the transformer below.
Anyone been through this process or have any thoughts/input?
https://taweber.powweb.com/store/022798sch.jpg
			
			
									
									
						Dropping secondary voltage for 6v6 range
Moderators: pompeiisneaks, Colossal
Re: Dropping secondary voltage for 6v6 range
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					Last edited by matt h on Fri Mar 27, 2015 3:07 pm, edited 1 time in total.
									
			
									
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				Heisenberg
- Posts: 25
- Joined: Sat Sep 29, 2012 3:45 am
Re: Dropping secondary voltage for 6v6 range
Choke Input sounds ideal, but what choke to get? Something like a 10h 200ma?
			
			
									
									
						Re: Dropping secondary voltage for 6v6 range
I used a Hammond 193G Filter Choke - 10 H, 150 mA in a amp with 2x6v6, 12au7, 12ax7 and a 6sj7. It can handle 800v, some of the smaller Hammond chokes are max of 600v. I think my PT is 340-0-340v and gives a B+ of about 310v (IIRC).Heisenberg wrote:Choke Input sounds ideal, but what choke to get? Something like a 10h 200ma?