2. amps-preamps
  3. 182307-4001

Tube Amp Repair

Hi

I have a Primaluna evo300 integrated tube amp

recently one of my KT66 tubes went bad, i temporarily put a EL34 in which came with amp while waiting for new tube.

Putting the new KT66 in for some reason did not seat well and guide pin broke off.  I put the EL34 back in and some smoke came out the socket.   I then put the KT66 back in.

All 4 power tubes glow but no sound.   I do not want to ship unit back to west coast

ANYONE know a firm in NJ/NYC area that can take a look at what is going on?

 

Thanks MUCH

mlapenta
cleeds
6,078 posts
 

Steve Leung at VAS.

rodman99999
6,206 posts
 

     Did you remove the KT66's broken pin from the socket, before installing the EL34?

     I ask, because: a broken pin, if pushed through a tube socket, can often wreak havoc* on the other side.

     ie: There are wires and resistors that pass beneath the EVO300's, right channel sockets.

jasonbourne52's avatar
jasonbourne52
2,863 posts
 

@rodman99999 : the OP broke the plastic guide key on the center of the base. 

blisshifi's avatar
blisshifi
1,230 posts
 

I agree on the recommendation for Steve Leung. He often has a queue going but he does quality work and is a stand up guy. 

rodman99999
6,206 posts
 

@jasonbourne52 -

         Now, back to reality:

https://www.tubesforamps.com/broken-guide-pins

https://www.youtube.com/watch?v=LQG-dq38lFo

https://www.thegearpage.net/board/index.php?threads/are-tubes-with-broken-guide-pin-still-okay-to-use.735628/

https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1588615343/3     

     There's a, "key" on the side of the, "guide pin" and that fits in a, "keyway", in the side of the, "guide pin hole", to be precise (correct nomenclature).      Folks still interchange the terms, however.              

     Push a couple bare wires and/or resistor leads together with a piece of plastic and let me know how that works out for you.

                       Have a nice (imaginary) day, "Jason Bourne".

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