Hello i am a bit in need of some help
i removed my diodes from my board and i need to look at another board to be sure i installed mined correctly it seems the 750 B i have had a 251D board in it
and i cant find a correct schematic so i am asking for a few pictures to double check
i removed my diodes from my board and i need to look at another board to be sure i installed mined correctly it seems the 750 B i have had a 251D board in it
and i cant find a correct schematic so i am asking for a few pictures to double check
Here are the 750B and 250 manuals, if that helps any. Normally the diode pcb footprint has a
heavy line at the cathode lead, like the diode itself always has. Can you post a photo of your pcb?https://www.hifiengine.com/manual_library/bgw/750.shtml
https://www.hifiengine.com/manual_library/bgw/250.shtml
I see your problem, no silk screen or other ID. You'll have to get schematic if not a photo of a good board.
BGW Transformer
Hello has anyone tried a Tranformer Tranplant ??
My 750B Humms not trtu the speakers only
and i am thinking of transplant !! ¨¨
Hello has anyone tried a Tranformer Tranplant ??
My 750B Humms not trtu the speakers only
and i am thinking of transplant !! ¨¨
I have 2 dead BGW 750b's. I have one board that seems to have several parts that have exploded.
I am hoping to get 1 working one out of the 2 and use the other to build a L20 style amplifier.
But I am following this and other BGW threads on here. Massive and well built amp.
Thanks.
Srinath.
I am hoping to get 1 working one out of the 2 and use the other to build a L20 style amplifier.
But I am following this and other BGW threads on here. Massive and well built amp.
Thanks.
Srinath.
It´s a stereo amplifier, meaning both channels "should" be the same.
I´d either repair the dead channel, worst case if the PCB is nuked, clone the good one, OR gut it and build 2 x L20 amplifiers or whatever.
Given that it must match available space, supply, connectors,heatsink, etc. , repairing/cloning is by far the best and most realistic option.
I´d either repair the dead channel, worst case if the PCB is nuked, clone the good one, OR gut it and build 2 x L20 amplifiers or whatever.
Given that it must match available space, supply, connectors,heatsink, etc. , repairing/cloning is by far the best and most realistic option.
Yea I was thinking of fixing 1 set of boards. Making a good 750b.
The other one likely to be used in a L30 clone.
Thanks.
Srinath.
The other one likely to be used in a L30 clone.
Thanks.
Srinath.
Hi Audiomagnate
The 750 and 620 modules are different in voltage gain.
Also most 750 & 620 use an LM318 in the front end.
Later versions use a diffpair and do not have an output relay module similar to the 8000 family.
Duke
The 750 and 620 modules are different in voltage gain.
Also most 750 & 620 use an LM318 in the front end.
Later versions use a diffpair and do not have an output relay module similar to the 8000 family.
Duke
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