Dynastatic speakers arrived but do not want to do anything before consulting with you

Jump to Latest
#41
tomchr said:
These speakers - or at least the mid/tweeter part - seems to be some sort of DIY electrostatic speaker.
Click to expand...

More like a brand not far removed from the garage.

Caps date it to late 60s/70s.

Quite a few ESL + woofer. Qw hd B&W DM602 in the shop and much later i ran across some Jantzens.

3515230-fd5cf41f-bampw-dm-70-speakers-1596577626.jpg


There were many European consoles in the tube software tube voltages thaty uses SE ESL tweeters.

dave
 
  • Like
Reactions: bazza31
#46
AllenB #45 and Galu, thank you, these are very dangerous. The spair panels I did not see any fuse. The plugs have 5amp fuses in and as in the pictures their are no fuses to see. If ther are readings to be checked I'd rather them be on the spair panels as they are safer than the ones plugged on
 
#47
Here's some additional information on the Alex Shackman electrostatic panels, extracted and edited as before from this old thread:

H

Thread 'Can U identify these electrostatic units ?'

Hello
I was a speaker designer for Cambridge Audio in my youth, working on R50's and R40's and newer designs.
In my earlier student days (early 70's) my first purchased speakers were a pair of hybrid electrostatics that included the upper mid to high end units pictured here and sourced from a dealer located in North London suburbs (I think).
An externally hosted image should be here but it was not working when we last tested it.
[sorry, original picture location no longer available - see post #33 for new picture]
I quickly blew the bass units at a student party but the electrostatics were incorporated into...

See post #3 in the above thread for a PDF of a circuit diagram which may or may not correspond exactly with Bazza's speakers.

The panels employ a comparatively low HT voltage of around 400 V and have a very small stator gap. A cotton-like thread is used to space the membrane from the stators. The panels were designed in the era of low powered amplifiers and had the reputation of being hard to drive. The impedance dropped to 1 or 2 ohm at 20 kHz. The electrostatic panels are single ended and not push-pull.

Out of interest, Bazza, what are the dimensions of your panels? Are they 20 inches by 8 inches?
 
#50
Galu said:
Here's some additional information on the Alex Shackman electrostatic panels, extracted and edited as before from this old thread:

H

Thread 'Can U identify these electrostatic units ?'

Hello
I was a speaker designer for Cambridge Audio in my youth, working on R50's and R40's and newer designs.
In my earlier student days (early 70's) my first purchased speakers were a pair of hybrid electrostatics that included the upper mid to high end units pictured here and sourced from a dealer located in North London suburbs (I think).
An externally hosted image should be here but it was not working when we last tested it.
[sorry, original picture location no longer available - see post #33 for new picture]
I quickly blew the bass units at a student party but the electrostatics were incorporated into...

See post #3 in the above thread for a PDF of a circuit diagram which may or may not correspond exactly with Bazza's speakers.

The panels employ a comparatively low HT voltage of around 400 V and have a very small stator gap. A cotton-like thread is used to space the membrane from the stators. The panels were designed in the era of low powered amplifiers and had the reputation of being hard to drive. The impedance dropped to 1 or 2 ohm at 20 kHz. The electrostatic panels are single ended and not push-pull.

Out of interest, Bazza, what are the dimensions of your panels? Are they 20 inches by 8 inches?
Click to expand...
The large in the cabinet are 12in by 7in horizontally length/height curved towards the front. Tje smaller ones are 9in by 7in vertical height/length curved towards the front
 
You must log in or register to reply here.
Top Bottom