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Thread: FS:EL34 Push Pull Mono Block valve amplifiers. Based on Pete Millett PP driver PCBs.

  1. #1
    Join Date: Jan 2014

    Location: Northants

    Posts: 157
    I'm Martin.

    Default FS:EL34 Push Pull Mono Block valve amplifiers. Based on Pete Millett PP driver PCBs.

    Pair of EL34 push pull monoblock amplifers based on the Universal Driver PCB's from Pete Millett.

    I built these about five years ago to drive a pair of Quad ESL57 which they did really well. Since then they have been in constant daily use with Living Voice OBX, Harbeth P3ESR and Harbeth M30.1 and been 100% reliable with marvellous sound quality.

    Constructed on a pair of Hammond soild walnut chassis with aluminium top and bottom plates.

    Switchable, Ultra Linear or Triode mode. 25 watts per channel class A in Ultra Linear. 15 watts per channel class A in Triode mode.

    Valve rectified choke input power supply.

    http://www.pmillett.com/push-pull_kt...driver_pcb.htm.



    The driver PCB uses a Sowter transformer at the input for splitting the phase followed by two triode differential stages using the 6SN7GT dual triode valves driving the EL34 push pull output stage. Can be used with unbalanced RCA or balanced XLR input from a pre amplifier.

    All Hammond iron, mains transformer, chokes and output transformer. The output transformer is a beefy 60 watt Hammond 1650PA which is over specified for EL34ís, but it means that KT88ís and 6550 could also be used.

    Output transformer taps and binding posts for 4, 8 and 16 Ohms.





    Comes with two NOS Mullard CV378 (GZ37) rectifier valves, four NOS Raytheon 6SN7GTB input / driver valves and two new unused pairs of Tung Sol EL34B power pentode output valves.









    Quality components used througout, Black Gate cathode bypass capacitors. Russian paper in oil coupling capacitors.











    £975 Buyer to inspect, audition and collect. Payment by cash or bank transfer.

    I'd rather not trust these to a courier, but shipping at buyers cost and risk. These are heavy, 15Kg each without valves, so they would ideally need to be crated for shipping.
    Last edited by disarmamant; 11-02-2018 at 10:35.

  2. #2
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,229
    I'm Geoff.

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    Those look great Martin, beautifully made. I love beefy EL34 amps, they always sound so musical. Not parting with mine.

  3. #3
    Join Date: Jan 2014

    Location: Northants

    Posts: 157
    I'm Martin.

    Default

    Quote Originally Posted by walpurgis View Post
    Those look great Martin, beautifully made. I love beefy EL34 amps, they always sound so musical. Not parting with mine.
    Thanks Geoff.

  4. #4
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 36,229
    I'm Geoff.

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    Wish I had the cash to spare mate. Those look so tempting. I'd like an extra set of monoblocks.

  5. #5
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 1,766
    I'm Lawrence.

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    I do like amps with 6sn7 driver valves

  6. #6
    Join Date: Jan 2014

    Location: Northants

    Posts: 157
    I'm Martin.

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    Post edited, more information added.


    Sent from my iPad using Tapatalk

  7. #7
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 1,766
    I'm Lawrence.

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    Still can see any pics

  8. #8
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 46,087
    I'm Grant.

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    Quote Originally Posted by Lawrence001 View Post
    Still can see any pics
    must be your end or maybe if your using tapatalk
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER24, SPOTIFY - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  9. #9
    Join Date: Sep 2014

    Location: brighton uk.

    Posts: 3,357
    I'm jamie.

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    i can,the problems your end mate.
    My System/ Yamaha NS1000M speakers ,Pioneer PLC-590 turntable,Pioneer PA-5000,Alphason HR-100S-MCS,Zeta tonearms,Denon 103SA Cartridge's,Denon HA-500 Head Amp, John Wood KT88 Valve Amp,Sony 700ES Amp,Sony X555ES CD Player, Nakamichi ca5 pre amp ,

  10. #10
    Join Date: Mar 2014

    Location: KY - Scotland

    Posts: 3,203
    I'm Mike.

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    Images working fine here on Tapatalk and chrome

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