PT voltage question

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king9968
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PT voltage question

Post by king9968 » Tue Jun 02, 2009 12:28 pm

Hello
Ok well im getting ready to try a 2204 build,I have a 1955 HH scott pt and ot that had two 6l6 s,my red+red=790v or 395/395 and green+green=6.6v and their is 3 whiteish looking wires one im sure is a ground the other two together read 5.1v ? My question is what do i need to do to bring the voltage down to the 325 range,a resister value change.
any help or advice would be great Thanks Tracy

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novosibir
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Re: PT voltage question

Post by novosibir » Tue Jun 02, 2009 8:53 pm

Hello btw. (or something similar)! But with so many volts it's understandable, that you forgot to mention... 8)
king9968 wrote:... what do i need to do to bring the voltage down to the 325 range
Removing some windings from the HT secondary or another PT - anything else is a crutch and should be avoided.

Larry
The fault almost always is sitting in front of the amp :wink:

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king9968
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Re: PT voltage question

Post by king9968 » Tue Jun 02, 2009 11:49 pm

interesting most likely true. Im just trying to make a amp from what I have stockpiled . My grandfather witch was a tv repaire man back when people use to fix their stuff he passed away and I got all his electrical treasures one tube contraption from 1/16/43 looks like something from an old tv huge tubes bigger then 6550s anyway I got lots of stuff to play with. I've built a 18watt tmb from a layout.I have not found anything I would not try to fix or make, But still learning everyday.

king9968
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Re: PT voltage question

Post by king9968 » Wed Jun 03, 2009 9:03 pm

Wow I cant believe that im the only person in the world that wants to build with somthing that did not come from a kit.btw I made my turret board today out of an old clip board and some 5/32 1/2 inch pop rivets.

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Structo
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Re: PT voltage question

Post by Structo » Thu Jun 18, 2009 1:03 pm

Are the pop rivets aluminum?

If they are solder won't adhere to them. :wink:
Tom

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gldtp99
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Re: PT voltage question

Post by gldtp99 » Thu Jun 18, 2009 8:32 pm

king9968 wrote:Wow I cant believe that im the only person in the world that wants to build with somthing that did not come from a kit.btw I made my turret board today out of an old clip board and some 5/32 1/2 inch pop rivets.
I build with "other iron" frequently----the Mule M50 head in the amp clips (see my signature) has a Dagnall OT from a 1987xl that i got off the 'bay when somebody "upgraded"---the cast-off OT works pretty well.
I just ordered some Edcor PT's for 50 watt builds: http://www.edcorusa.com/Products/ShowPr ... spx?ID=677 --- i haven't used this PT before but i've used other Edcor iron-----i'll post when i build with one of these----- i'll be using some CE Dist 50 watter OT's i just got or i have some Merc Mag OT's on hand----thinking of a more modern sounding build........................gldtp99

PS-- It's true---- aluminum and solder aren't a great combination

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