New member saying hello and hoping to tap into the collective wisdom of this group.
I am a newbie at this, so please forgive any totally lame statements on my part.
I have picked up an older Bogen CH8 PA and I would like to mod it like Terry from D-Lab did in this video:
https://www.youtube.com/watch?v=sMfYSLZj4hc
I have email Terry about his conversion but he has not replied yet.
I am getting ready to order the parts, but I have a question about the filter cap can.
In the schematics that I can find online, the caps are: 5 µF@400V, 5 µF@400V, 5 µF@400V, 5 µF@400V. However, my cap can is: 20Mfd @450V, 20Mfd @450V, 20Mfd @450V, 20Mfd @450V (see pic)
And it looks like the Fender AA 764 schematic uses: 20µF @450V, 20 µF @450V, 20 µF @450V
Question 1: Is Mfd the same as µF? (I think it is, but just want confirmation)
Question 2: Is the schematic for the Bogen incorrect for my amp in terms of the filter capacitors? Or has the cap on my amp been changed.
Any tips or suggestions?
Relevant information: I plan on replacing the 6SF5 with a 12AX7 and if I can figure it out, rewiring the 6SJ7 for a 6SL7 preamp tube like in the video.
Power transformer: Thordarson TS-24R01 Secondary 325V-0V-325V
Output transformer: Merit A2904
Thanks.
I am a newbie at this, so please forgive any totally lame statements on my part.
I have picked up an older Bogen CH8 PA and I would like to mod it like Terry from D-Lab did in this video:
https://www.youtube.com/watch?v=sMfYSLZj4hc
I have email Terry about his conversion but he has not replied yet.
I am getting ready to order the parts, but I have a question about the filter cap can.
In the schematics that I can find online, the caps are: 5 µF@400V, 5 µF@400V, 5 µF@400V, 5 µF@400V. However, my cap can is: 20Mfd @450V, 20Mfd @450V, 20Mfd @450V, 20Mfd @450V (see pic)
And it looks like the Fender AA 764 schematic uses: 20µF @450V, 20 µF @450V, 20 µF @450V
Question 1: Is Mfd the same as µF? (I think it is, but just want confirmation)
Question 2: Is the schematic for the Bogen incorrect for my amp in terms of the filter capacitors? Or has the cap on my amp been changed.
Any tips or suggestions?
Relevant information: I plan on replacing the 6SF5 with a 12AX7 and if I can figure it out, rewiring the 6SJ7 for a 6SL7 preamp tube like in the video.
Power transformer: Thordarson TS-24R01 Secondary 325V-0V-325V
Output transformer: Merit A2904
Thanks.
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