Quote:
Originally Posted by pj_rage /img/forum/go_quote.gif
Well I have one on the way to play with, I'll be happy to post some pics if no one has by the time I receive it.
What should be my number 1, 2, 3 mods?
I have some Panasonic FC 1200uf and 1500uf 50V caps around... can I make use of them?
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It would be hard for me to rank them in order as they are all worthwhile...
The most important would have to be adding the Bias Capacitors, they are
missing from the original design.
The Power/Output Caps and MOSFET will all get you noticeable improvements.
Replacing the Bias Trim Pots is more to replace a poor quality component with
one more suitable. If you plan on doing much tube rolling, it is much easier and accurate to adjust.
Finally, if it still has the poor quality push button on/off switch, just remove it, jumper where it was and turn the whole thing on and off with a power bar.
If it has the newer toggle switch then it should be OK.
Here are some component suggestions, they are by no means the only ones that will work but are strongly suggested. I included
Mouser Part Numbers.
Main Power Cap: one needed
10000uF @ 35 Volts. :
647-UFW1V103MRD
(this is
very big and will
just fit
Power Bypass Cap: one needed
1uF @ 63 volts :
505-MKS21.0/63/10
(replaces the cap directly behind the power jack)
Output Caps: two needed
1000uF @ 25 Volts :
647-UKW1E102MPD
Bias Cap: two needed
680uF @ 6.3 Volts :
647-PLE0J681MDO1
(soldered underneath across the Bias Trim Pot)
Bias Trim Pot: two needed
2K multi turn :
652-3266W-1-202LF
Output MOSFET : two needed
IRF510 :
844-IRF510SPBF
Some suggested tubes for tube rolling were just covered in a previous post...
