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Thread: Does someone has a schematic for the Zeppelin Percolator ?

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    Member Kagliostro's Avatar
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    Does someone has a schematic for the Zeppelin Percolator ?

    Does someone has a schematic for the Zeppelin Percolator 2W amp ? (it uses a 6AF11 compactron tube)

    With the 6AF11 tube a known and well documented amp is the Squirrel Monkey

    http://solorb.com/elect/musiccirc/squirrelmonkey1/

    I'm looking for the Zeppelin Percolator amp schematic, the Percolator uses the same Compactron 6AF11 tube

    https://zeppelindesignlabs.com/produ...or-2w-amp-kit/






    I've some info about the Percolator Kit, a documentation is available, but I miss the schematic

    Many Thanks

    K

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    Don't forget the joker g1's Avatar
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    Zeppelin is a member here. You could send a PM and ask for it.
    https://music-electronics-forum.com/...ad.php?t=38853

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    Senior Member vintagekiki's Avatar
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    Last edited by vintagekiki; 03-23-2020 at 09:19 PM. Reason: 1)
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    Member Kagliostro's Avatar
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    Thanks g1 & vintagekiki

    There is something that confuses me

    On the Squirrel Monkey the autor indicate the B+ to be 180V and the OT load was first 7K and then lowered to 3.5K

    B+ on the Zeppelin Percolator is 170V (as indicated on the istruction .pdf) unfortunately there is no indication about OT primary impedance

    I've find also an old 6AF11 radio project

    Click image for larger version. 

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    and this radio has a B+ of around 175V (250V CT PT = 125V x 1.4 = 175V B+) with 10K of OT primary impedance

    So I've

    180V B+ @ 3.5K load

    170V B+ @ xxK load

    175V B+ @ 10K load

    this confuses me a lot .....

    K

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    Last edited by Kagliostro; 03-22-2020 at 12:25 PM.

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    Senior Member vintagekiki's Avatar
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    Member Kagliostro's Avatar
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    Smile

    Ciao vintagekiki

    Many thanks for the link, even though I had that documentation

    I did a bit more of search and I've find indications on the web that report a 6K load for the 6AF11 on the Percolator

    same result if you do a bit of math

    Plate dissipation of the 6AF11 pentode is 5W, so Z = Va^2 / Pa

    170V x 170V = 28,900

    28,900 / 5W = 5,780 Ohm Load (close to 6K as told)

    K

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    Last edited by Kagliostro; 03-24-2020 at 04:54 PM.

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    Senior Member vintagekiki's Avatar
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