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Glad to help you . Ciao Marco

Take a look at the interconnect schematic . It's not easy to find led ( top right ) Ciao Marco

The led of peak unlimiter threshold is connected to pin 8 of peak unlimiter board and B+ through a 22k resistor. Ciao Marco

A last minute idea : Short the two legs of the relay if conctacs are in a decent state . I could not do , because my relays were destroyed . Ciao Marco

When the switch on ? Ciao Marco

Good luck ! Marco

-I fited the relay with adhesive strips by Pattex , since I didn't find an other solution . - Don't forget an anti sparkling cap 630 V ( 10000 pF for 120V and 22000 pF for 230 V ) -I fitted vertical caps ; no problem with clearance . -500 W drill and polish paste by Dremel for knobs . -Use a...

Better to assemble the bottom cover to lock everything . This is my story of my PL 4000s ( 2 units ) and one PL 1000 . Anyway everything is written between the lines of service manuals . ( I believe there are 3 versions and the most complete edition is the rev .6 81 . Ciao Marco

Replace the relay for switched outlets with a 24V 16A type with a 470 Ohm 1W in series with the coil . It's undersized ( another time bomb ) See PL 4000 service manual rev. 6 81. That's all folks ! ( if my memory served me ) Ciao Marco

All caps must be minimum 50 V . PL introduced this mod after S/N 5000 . Other suggestions : Mother board and control board are " locked " with input selector and volume pot , so it's necessary to assemble the faceplate to have a steady mechanical config ( without bad conctacts ) Atfer insert...

MG Chemicals 4226A Clear Insulating Varnish, 55 ml Liquid Bottle Ciao Marco

https://anasounds.com/produit/anasounds-sommercable-rca-female-connector-red/ Use this kind of connector and 2 short wires to connect it to the mother board . Original connectors , after 50 years , have become fragile and when you insert a male connector , after 3 / 6 months they could break ...

Two suggestions : - Replace RCA connectors : they are time bombs - Paint the solder points on the control boards using a pcb insulation paint : some shorts can occur when you insert the control board on the mother board Ciao Marco

I do agree with Jim ; tubes are not good for a phono amp . Anyway my question was related to the brands ( EL 34 for instance ) Ciao Marco

Now a million dollar question : What brand of tubes do you prefer ? I use JJ as recommended by VTA guys . ( together Tungsol ) Can you hear the difference ? Ciao Marco

http://www.tubes4hifi.com/tubes.htm Take a look here. Ciao Marco

https://www.ebay.com/itm/155001740353?_skw=el+34+reissued&itmmeta=01J85DZMBDFPXEE9Q0TACQNRS6&hash=item2416d2dc41:g:OlwAAOSwgitdtbxA&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKnL%2B47VZ1gCZHevId1Zfi02vBZm%2BkbFsJkwWuBt2EKr1SvzqImuL%2FOfZLzzYV9E%2Bz%2B6s6fAQARGGQYKimGhEyCXrXU9pwotQvrWGpeVMO7uVS5M...

Ciao from Italy . Marco

Have a fun , Lee . Ciao Marco

-Remove all boards -Insert tone board and logic board after cleaning their connectors . -Correlator , peak unlimiter , ambience , equalizer , tone , tape monitor in out position . -Use aux input and check again . In this config it's only a 15 dB line amp . Ciao Marco