Hello all,
I am planning to build the Crack stock when it arrives. However, I would like to make the necessary modification to the chassis plate to accommodate an octal socket before I start, so that I do not have to produce metallic debris once everything is assembled. My experience with the Extended Foreplay conversion to 6SN7 taught me protecting the circuit after the fact is not the easiest and most pleasant thing.
It is a good thing that one can now download the manual at the time of purchase, as one can get familiar with what to expect.
I see that pins A3 and A8 are each connected to the socket's centre pin via a HLMP-6000 led and then to 3L.
Octal sockets do not have a centre pin. I found a socket that has solder lugs on the mounting bracket. I thought that I could use these to solder each end of the red led and then make the connection to 3L. Reading different posts on the use of a 6SN7 instead of a 12AU7, I seem to understand that this is a no-no, perhaps because the red led would be connected to ground at two places? Can anyone confirm this?
I also have a Belton socket. The diameter of each is pretty close (0.38mm difference). I wonder if I could just take the mounting bracket with the solder lugs, remove enough metal to get rid of the screw holes and transfer it onto the Belton socket, making sure that it is isolated from the chassis. Then, instead of having a socket with a centre pin, I have a socket with a ring with solder lugs.
The reason for wanting to convert to 6SN7 is that I have many of that tube and very few 12AU7, and it seems easy.
It has been nearly 6 years since I build my Bottlehead kits, and I am surprised that I now feel that I understand what is going on as I read the manual. Everything was so mysterious 6 years ago.
It is amazing how Bottlehead has evolved since the last time, with new products and refinement. It is passion, intelligence and intuition at work.
Sincerely,
Richard
« Last Edit: November 07, 2014, 09:05:10 AM by richmi »
Richard Milette
Seduction C4S
Extended Foreplay III (converted to 6SN7 Nov. 2011)
Paramount 300Bs
Crack (6SN7) + Speedball + HD650