T-
Cool!! AFAIK... The 200-130-250 is basically the same as the 200-130..But in the export version..This is the one used in MM Dumble amps and are wonderful transformers for a 700v version.. You can use the extra 6.3V filament supply to run the relays and the separate (Orange wires) tap for the bias supply.. Good Luck and let me know if I can help further!!
Tony
Music Man RD100 conversion
Moderators: pompeiisneaks, Colossal
Re: Music Man RD100 conversion
Last edited by talbany on Wed Aug 10, 2011 11:09 pm, edited 1 time in total.
" The psychics on my bench is the same as Dumble'"
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Dingleberry
- Posts: 192
- Joined: Tue Jul 13, 2010 8:12 pm
Re: Music Man RD100 conversion
Thank's. Keep you in touch.
-T
-T
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Dingleberry
- Posts: 192
- Joined: Tue Jul 13, 2010 8:12 pm
Re: Music Man RD100 conversion
Hi tony.
This is the picture from the transformer.
There are two filament supplys in parallel am I correct?
Are both of them 3A each?
If I use other for relay supply, then I have only 3A left for the whole amp.
It's gonna be running extremely hot if I use two EL34's and three 12AX7's.
That makes 3.9A total. Of course I can use 6L6's and then cut down the current consumption to 2.7A but it will still be very close to maximum.
I would like to make it kind of workhorse amp that you don't have to be aware allt the time if the amp is running too hot...
I have some small lefover transformers that I can use for relay supply.
Probably some of them are good for 5V or 9V or 12V or what ever relay voltage I choose.
I don't even have the relays yet. This amp is only on paper right now;)
-T
This is the picture from the transformer.
There are two filament supplys in parallel am I correct?
Are both of them 3A each?
If I use other for relay supply, then I have only 3A left for the whole amp.
It's gonna be running extremely hot if I use two EL34's and three 12AX7's.
That makes 3.9A total. Of course I can use 6L6's and then cut down the current consumption to 2.7A but it will still be very close to maximum.
I would like to make it kind of workhorse amp that you don't have to be aware allt the time if the amp is running too hot...
I have some small lefover transformers that I can use for relay supply.
Probably some of them are good for 5V or 9V or 12V or what ever relay voltage I choose.
I don't even have the relays yet. This amp is only on paper right now;)
-T
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Re: Music Man RD100 conversion
T-
If you look at the PT wiring diagram on the MM you will see only 1 winding so I would assume that all 4 filiment wires share that same winding?..However the export version 250 might be different? (though I doubt it)
If you are unsure you can always ohm them out and see if they read different?.. Here is a pic of how HAD ran his MM PS...This amp is a 100w set up for EL-34's using a 200-130 PT..
Tony
If you look at the PT wiring diagram on the MM you will see only 1 winding so I would assume that all 4 filiment wires share that same winding?..However the export version 250 might be different? (though I doubt it)
If you are unsure you can always ohm them out and see if they read different?.. Here is a pic of how HAD ran his MM PS...This amp is a 100w set up for EL-34's using a 200-130 PT..
Tony
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" The psychics on my bench is the same as Dumble'"
Re: Music Man RD100 conversion
Tony, did that Dumble have a locking bias pot? Sure looks like one from what I can see.
Jelle
Jelle
Re: Music Man RD100 conversion
jellejelle wrote:Tony, did that Dumble have a locking bias pot? Sure looks like one from what I can see.
Jelle
Not sure!
Tony
" The psychics on my bench is the same as Dumble'"