So over a number of years I collected parts, including the following Lundahl iron, for building either Lynn Olson's Karna or Kevin's variation of the PP300B amp. I have essentially all the parts to build them but I never got further than to start to put the power supply chassis together. My life and its priorities changed and I am not getting back into DIY in any meaningful way, so I am listing my iron for sale here.
LL9202AM/PP $500 for the pair SOLD
LL1692A AM/PP $300 for the pair
LL1667AM/5ma $300 for the pair SOLD
Tribute SOLD
My pricing works out to ~60% of retail and these are all unused, unsoldered. Just sat on my shelf for years. If one has interest, you can inquire about all or most of the rest of the parts.
LL9202AM/PP $500 for the pair SOLD
LL1692A AM/PP $300 for the pair
LL1667AM/5ma $300 for the pair SOLD
Tribute SOLD
My pricing works out to ~60% of retail and these are all unused, unsoldered. Just sat on my shelf for years. If one has interest, you can inquire about all or most of the rest of the parts.
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Also have most all of the rest of the parts to build a variation on the Karna amp.
The power supply iron is Onetics and vintage industrial filament transformers.
The interstage and OPTs are Lundahl Amorphous (already listed).
The input splitter is Tribute cobalt.
The thing was I was leaning towards K&K's input and driver stage config instead of the dual interstages of the Karna, so the first interstage is replaced with a K&K choke.
The power supply iron is Onetics and vintage industrial filament transformers.
The interstage and OPTs are Lundahl Amorphous (already listed).
The input splitter is Tribute cobalt.
The thing was I was leaning towards K&K's input and driver stage config instead of the dual interstages of the Karna, so the first interstage is replaced with a K&K choke.
Adding some photos. Also have the Onetic filament transformer not shown. JJ 300B quad. Have a bunch of 6SN7s, the 45's were all sold and didn't have a good quad match amongst them anyway.
The PSU units I was putting together using an industrial aluminum baking pan. Not wired up. The chokes are 10H PSU chokes that I sourced from Asia. That is one side's PSU btw, there is another. Those are the two PSU TXs and the Raytheon filament transformer for the 4 damper diodes. The PSU units were stored on a shelf in my woodshop so they are dirty, but that would clean up very well.
The PSU units I was putting together using an industrial aluminum baking pan. Not wired up. The chokes are 10H PSU chokes that I sourced from Asia. That is one side's PSU btw, there is another. Those are the two PSU TXs and the Raytheon filament transformer for the 4 damper diodes. The PSU units were stored on a shelf in my woodshop so they are dirty, but that would clean up very well.
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This was the Karna schematic I was working from
http://www.nutshellhifi.com/Karna.gif
Except I had planned to use Kevin Kennedy's input stage with choke loaded 6sn7's into the 45s rather than interstage. That is why the LL1667AM/5ma instead of an interstage.
http://www.nutshellhifi.com/Karna.gif
Except I had planned to use Kevin Kennedy's input stage with choke loaded 6sn7's into the 45s rather than interstage. That is why the LL1667AM/5ma instead of an interstage.
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