1. Prasi 2 nos
2. Member (nareshn) thro PM 2 nos.
3. Bix 2 nos.
4. Indianajo 9 nos.
5. avtech23 2 nos.
7 PCBs remain.
2. Member (nareshn) thro PM 2 nos.
3. Bix 2 nos.
4. Indianajo 9 nos.
5. avtech23 2 nos.
7 PCBs remain.
thank you for the hard work overall feedback🙂. I wonder if it will be stable with fast devices like mjexxxxx, although couldnt see ft spec in the original transistor datasheet.
Perrrfect , just one small question how do you load the Cordell Models ? If you as add MJL21194 you could increase the voltage to 80-100v
I think you just drop the .txt file in the same place as the .asc file.
The .incl command in the schematic then directs the program to retrieve.
The .incl command in the schematic then directs the program to retrieve.
Also be aware that file name should be the same as in .incl directive.
You can find original file in archive I uploaded one page before.
You can find original file in archive I uploaded one page before.
Wow that was harsh ha ha ha! Usually such a firm sentiment would come from "no caps allowed in my amp" camp.
IMHO not much would (could) change that would in any meaningful way affect the layout ... Only component value changes. But that could also mean transistor substitutions and thus different packages, so who knows.
Apex Retro Amp
1. Prasi 2 nos
2. Member (nareshn) thro PM 2 nos.
3. Bix 2 nos.
4. avtech23 2 nos.
16 PCBs remain.
1. Prasi 2 nos
2. Member (nareshn) thro PM 2 nos.
3. Bix 2 nos.
4. avtech23 2 nos.
16 PCBs remain.
Last edited:
Yes my friend, let's wait someone to help with the simulation, then i know a good friend ho can do the rest.
Your good friend has asked me to deliver this to you😉😀. It just something I made in 6 hrs straight.
regards
Prasi
Attachments
thanks man!
Ok, Not a major problem. done...Small heatsink can even be a 1-1.5 mm al plate bent in u-shape. may be BF469/471 are better placed for T2 duty?
regards
prasi
Attachments
Hard to tell - these BF469 are 100mA parts. Perhaps a BF457/458? But these have lower hfe (!) Would have to measure each before install. A BD139 seems like a "universal fit", ha ha.
But yes, the small U-shape h-sink is what I had in mind when suggesting that.
A sidenote - with TO126 vas (probably useful if someone wants to build a "macho" version running on higher PSU rails), a TO92 BC639 would be pin-compatible (also bce) if somebody wants to build a scaled-down version...
But yes, the small U-shape h-sink is what I had in mind when suggesting that.
A sidenote - with TO126 vas (probably useful if someone wants to build a "macho" version running on higher PSU rails), a TO92 BC639 would be pin-compatible (also bce) if somebody wants to build a scaled-down version...