mikeyB
Well-known member
Hi, I seem to be in Mic repair season!!
Got an AKG Solidtube on the bench with guess what?.... a dead transformer!!
This is the 5th I've got to repair.
A replacement TX is around €90!!!! so looking for an alternative method. (Long gone the days when I could contact "The" Mic guy and get a TX for £25 ...... retired long ago).
Was looking at the thread re the schematic and the "mad" heater design.... 23Vac to drop to 12.6VDC.
I was thinking along the lines of a 15V or 18V SMPS feeding the heater reg and also a step up nixie type driver to get the HT required.
Has anyone experimented with this idea? - would save me re-inventing the wheel!!
Thanks in advance.....
Got an AKG Solidtube on the bench with guess what?.... a dead transformer!!
This is the 5th I've got to repair.
A replacement TX is around €90!!!! so looking for an alternative method. (Long gone the days when I could contact "The" Mic guy and get a TX for £25 ...... retired long ago).
Was looking at the thread re the schematic and the "mad" heater design.... 23Vac to drop to 12.6VDC.
I was thinking along the lines of a 15V or 18V SMPS feeding the heater reg and also a step up nixie type driver to get the HT required.
Has anyone experimented with this idea? - would save me re-inventing the wheel!!
Thanks in advance.....