Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on September 21, 2010, 12:13:39 pm

Title: Magnatone M10A OT
Post by: plexi50 on September 21, 2010, 12:13:39 pm: Does anyone know the primary impedance of a Magnatone M10 output transformer? I think i see 10,000 at 16 ohm on a barley ledgible old schematic. That cant be right can it?
Title: Re: Magnatone M10A OT
Post by: sluckey on September 21, 2010, 12:35:07 pm: That's right.
Title: Re: Magnatone M10A OT
Post by: jojokeo on September 21, 2010, 02:10:39 pm: Excuse me for buttin' in but does anyone know what happened and/or where the Maggie schem and info site went? I was looking for it a couple of weeks ago.
Title: Re: Magnatone M10A OT
Post by: plexi50 on September 21, 2010, 02:28:34 pm: Where on earth and i going to find a 10,000K primary ot to put in this M10?
Title: Re: Magnatone M10A OT
Post by: plexi50 on September 21, 2010, 02:35:27 pm: Quote from: jojokeo on September 21, 2010, 02:10:39 pm
Excuse me for buttin' in but does anyone know what happened and/or where the Maggie schem and info site went? I was looking for it a couple of weeks ago.

A lot of the Magnatone sites i have found at one time or another have slowly dissapeared. Im not sure.
Title: Re: Magnatone M10A OT
Post by: sluckey on September 21, 2010, 02:50:59 pm: The site was temporarily down but it's back up now.
Title: Re: Magnatone M10A OT
Post by: sluckey on September 21, 2010, 02:57:08 pm: Quote from: plexi50 on September 21, 2010, 02:28:34 pm
Where on earth and i going to find a 10,000K primary ot to put in this M10?
10K:16r is the same as 5K:8r, so just get a Hammond 25 to 30 watt UL with 5K primary and 8r secondary and connect a 16r speaker.
Title: Re: Magnatone M10A OT
Post by: phsyconoodler on September 21, 2010, 04:50:10 pm: Hammond 125E has multiple impedances and they sound great too.
Sure not necessary to use an ultralinear OT,but a bigger Hammond might be cool.Two 7189's are not much different than EL84's.
Title: Re: Magnatone M10A OT
Post by: plexi50 on September 21, 2010, 06:55:33 pm: Cant seem to find a 5K 30 watt OT
Title: Re: Magnatone M10A OT
Post by: sluckey on September 21, 2010, 08:07:01 pm: Quote from: plexi50 on September 21, 2010, 06:55:33 pm
Cant seem to find a 5K 30 watt OT
What? Guess you didn't go to the Hammond website.
Title: Re: Magnatone M10A OT
Post by: plexi50 on September 21, 2010, 09:03:10 pm: I have been all over the Hammond site. Closest thing i have found is 4K 35 watts. I dont think the tremelo in this thing will sound as sweet as it is known for with a lower primary. I found a 10K 35 watt with ultra taps but it was SE
Title: Re: Magnatone M10A OT
Post by: VMS on September 22, 2010, 01:25:08 am: Quote from: plexi50 on September 21, 2010, 06:55:33 pm
Cant seem to find a 5K 30 watt OT

1645A

http://www.hammondmfg.com/1608A.htm (http://www.hammondmfg.com/1608A.htm)
Title: Re: Magnatone M10A OT
Post by: sluckey on September 22, 2010, 06:16:10 am: Quote
I dont think the tremelo in this thing will sound as sweet as it is known for with a lower primary.
Vibrato (not tremolo) happens in the preamp. What does the OT have to do with it?
Title: Re: Magnatone M10A OT
Post by: plexi50 on September 22, 2010, 07:47:39 am: Your right. Im wasnt thinking clearly. Vibrato. I thought the impedance would dictate the tone some what. There a cloud going by. Thanks for finding the link to the 5K 30 watt OT. Im having one of those weeks.