QUAD ESL Tone Burst Generator (TBG)

[nickds1]

Hi

I have a pair of mid s/n (14000s) ESL 63s in need of an overhaul.

Reading the ESL 63 service notes, Quad recommend the use of a specific design of tone burst generator and give an example schematic (Fig 3, page 8).

Before I go away and build this, which will take a couple of hours at least, has anyone got one or knows where I can get one or even if someone has done PCBs for a TBG?

Thanks!

Ps. I am a professional EE with the correct equipment and knowledge, used to working with (very) HV and have a high degree of personal caution/self preservation! Having said that, I've never worked on electrostatic speakers before.

 

[jan.didden]

Schematic?

jan

 

[nickds1]

Hi Jan,

See service manual attached. Fig 3, page 8.

Ps. I have and have read every edition of Linear Audio - an early subscriber - and was chatting to Morgan Jones about these speakers at a show only yesterday.

 

[EdGr]

Audacity can generate sine bursts interspersed with silence. It is easy to use and free.
Ed

 

[jan.didden]

Hi Jan,

See service manual attached. Fig 3, page 8.

Thanks! I didn't have that yet.
As @EdGr says, no need to build hardware.

Jan

 

[jan.didden]

was chatting to Morgan Jones about these speakers at a show only yesterday.

What show was that? I guess Morgan is doing fine?

Jan

 

[nickds1]

Audiojumble in Kent, UK.

I was selling all sorts of stuff. MJ was there as we're others from Audio-Talk. He was in good form!