Avo 7 battery - UK Vintage Radio Repair and Restoration Discussion Forum

RobinBirch · 26th Sep 2013, 3:07 pm

Hi,
Has anyone either got a spare 1.5V battery for one of these (condition not important) or can they send me a dimensioned sketch?

Kind regards

Robin

pmmunro · 26th Sep 2013, 3:44 pm

There was a thread some years ago in which we discussed the cell used in the Avo version of the Testmeter Type 'D; - 1.5V cell Type 5S/2000.

This should be the same as used in older Model 7s. Later a normal 'D' cell was used with an adapter which was essentially a piece of synthetic resin bonded paper with a rectangular aperture cut out and two phosphor bronze bands cut to form bows which fitted inside each end to form contacts.

As this has often been discussed before I'm almost certain there will be a drawing I posted in a previous thread but I can't find the thread at present. If the drawing is of interest. I will post another copy.

PMM

RobinBirch · 27th Sep 2013, 11:47 am

Hi PMM,
I've looked as well and I can't find it either :-( Would you please repost the drawing.

Many thanks

Robin

PS: Are these the same cells that used to be used in Field Telephones?

AC/HL · 27th Sep 2013, 11:58 am

I think this may be it:
https://www.vintage-radio.net/forum/...ad.php?t=18336

threeseven · 27th Sep 2013, 12:06 pm

I have on as per post 12 in that thread, in the 3rd image, the type with flying lead.
It's 1.25" square x 3.4" long. Terminal post stands 0.32" to the top of the thread from the top of the battery.

RobinBirch · 30th Sep 2013, 10:43 am

Thanks everyone

Robin

RobinBirch · 30th Sep 2013, 10:46 am

PMM
Do you have a file for printing the battery sleeve as in the other post?

Kind regards

Robin

pmmunro · 2nd Oct 2013, 2:07 pm

Robin,

A drawing of the AVO battery adapter is attached. I will try to find the artwork for the reproduction of original type of cell and post that too.

I have assumed that the original design was based on imperial units -

PMM.

RobinBirch · 3rd Oct 2013, 3:01 pm

Many thanks

Robin

26th Sep 2013, 3:07 pm	#1
RobinBirch Hexode Join Date: Apr 2003 Location: Cotswolds, UK. Posts: 465	Avo 7 battery Hi, Has anyone either got a spare 1.5V battery for one of these (condition not important) or can they send me a dimensioned sketch? Kind regards Robin

26th Sep 2013, 3:44 pm	#2
pmmunro Octode Join Date: Jul 2004 Location: Dundee, UK. Posts: 1,813	Re: Avo 7 battery There was a thread some years ago in which we discussed the cell used in the Avo version of the Testmeter Type 'D; - 1.5V cell Type 5S/2000. This should be the same as used in older Model 7s. Later a normal 'D' cell was used with an adapter which was essentially a piece of synthetic resin bonded paper with a rectangular aperture cut out and two phosphor bronze bands cut to form bows which fitted inside each end to form contacts. As this has often been discussed before I'm almost certain there will be a drawing I posted in a previous thread but I can't find the thread at present. If the drawing is of interest. I will post another copy. PMM

27th Sep 2013, 11:47 am	#3
RobinBirch Hexode Join Date: Apr 2003 Location: Cotswolds, UK. Posts: 465	Re: Avo 7 battery Hi PMM, I've looked as well and I can't find it either :-( Would you please repost the drawing. Many thanks Robin PS: Are these the same cells that used to be used in Field Telephones?

27th Sep 2013, 11:58 am	#4
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: Avo 7 battery I think this may be it: https://www.vintage-radio.net/forum/...ad.php?t=18336

27th Sep 2013, 12:06 pm	#5
threeseven Octode Join Date: May 2010 Location: Worcestershire, UK. Posts: 1,880	Re: Avo 7 battery I have on as per post 12 in that thread, in the 3rd image, the type with flying lead. It's 1.25" square x 3.4" long. Terminal post stands 0.32" to the top of the thread from the top of the battery. __________________ BVWS member

30th Sep 2013, 10:43 am	#6
RobinBirch Hexode Join Date: Apr 2003 Location: Cotswolds, UK. Posts: 465	Re: Avo 7 battery Thanks everyone Robin

30th Sep 2013, 10:46 am	#7
RobinBirch Hexode Join Date: Apr 2003 Location: Cotswolds, UK. Posts: 465	Re: Avo 7 battery PMM Do you have a file for printing the battery sleeve as in the other post? Kind regards Robin

3rd Oct 2013, 3:01 pm	#9
RobinBirch Hexode Join Date: Apr 2003 Location: Cotswolds, UK. Posts: 465	Re: Avo 7 battery Many thanks Robin