- May 9, 2008
- 4,081
- 1,236
- Disclosures
- Proprietor Springvale Studios
I was looking at this blown old traynor 25 guitar amp that someone abandoned at the rehearsal room and was shocked at the obvious quality and adaptability of the two printed circuits.
They are covered in very nice mullard 280 tropical fish caps,
mostly discreet transistors and hardly a lytic cap in there.
So as is my wont I threw the box speaker and chassis in the
bin as the TIP 100 and 105 Darlington Transistors are fried
i just binned them too, they are not getting replaced either. (now its got some serious power supply +- 31 volts & +-18V) Built it into a rack case with the pre amp board in a nice shielded partition, hooked up the line out and was very pleased with what i heard, tried all the equivalent op amps in the solitary op amp socket. Interesting!
Now the thing is, assuming the thing is useless as anything other than an interesting pre amp with loads of crunch gain a mid boost switch and LF cut and a HF boost. Oh and a cool acutronics reverb. Zing!
Is there any of the main amp board that could be used to drive an output transformer for balanced line out.
and if so across which components in the PSU main amp board would you fit it and about what sort of impedance would I need for the primary:
Its just that I inherited a pile of very high quality western electric +24 dB 20 Hz to 20k audio transformers of all different and some very low impedances and types.
I even have one with a measured 4.6 ohm dc resistance on 1 & 2 and 31.1 ohms across 3 & 4.
marked MO 47161-50 73/47 if that means anything to anyone.
I have some that measure 15 ohms dc each side of a center tap.
Now where shall I stick one across chaps, before the diodes?.
Or the whole hog, - the Tip 100/105 pair of course.
I may just use it as a buffered out, to drive a bridge rectifier for an analogue VU meter
They are covered in very nice mullard 280 tropical fish caps,
mostly discreet transistors and hardly a lytic cap in there.
So as is my wont I threw the box speaker and chassis in the
bin as the TIP 100 and 105 Darlington Transistors are fried
i just binned them too, they are not getting replaced either. (now its got some serious power supply +- 31 volts & +-18V) Built it into a rack case with the pre amp board in a nice shielded partition, hooked up the line out and was very pleased with what i heard, tried all the equivalent op amps in the solitary op amp socket. Interesting!
Now the thing is, assuming the thing is useless as anything other than an interesting pre amp with loads of crunch gain a mid boost switch and LF cut and a HF boost. Oh and a cool acutronics reverb. Zing!
Is there any of the main amp board that could be used to drive an output transformer for balanced line out.
and if so across which components in the PSU main amp board would you fit it and about what sort of impedance would I need for the primary:
Its just that I inherited a pile of very high quality western electric +24 dB 20 Hz to 20k audio transformers of all different and some very low impedances and types.
I even have one with a measured 4.6 ohm dc resistance on 1 & 2 and 31.1 ohms across 3 & 4.
marked MO 47161-50 73/47 if that means anything to anyone.
I have some that measure 15 ohms dc each side of a center tap.
Now where shall I stick one across chaps, before the diodes?.
Or the whole hog, - the Tip 100/105 pair of course.
I may just use it as a buffered out, to drive a bridge rectifier for an analogue VU meter
