How To Remove The Battery Cage From an AVO Meter 8? - UK Vintage Radio Repair and Restoration Discussion Forum

OldTechFan96 · 19th Oct 2017, 11:04 am

Hello,

I would like to investigate a crack in the case of my newly bought AVO Meter 8. The only way to take a look would be to remove the battery cage. Since it looks bolted together I don't want to loosen the screws and hope for the best.

What would be the best way to remove the battery cage?

Barnmead · 19th Oct 2017, 1:29 pm

The four countersunk screws you can see have nuts on the inside. You will need a long box spanner to get the lower ones undone. Putting them back is a bit more difficult. As i recall I lashed up something with a box spanner an a piece of tubing. Hope this helps.

19th Oct 2017, 2:23 pm

Stick 'em (the nuts) on before reassembly.

The Philpott · 19th Oct 2017, 5:17 pm

On some examples one (or both?) of the dome-head screws (for the battery box cover) threads into nuts that sit in recesses in the battery box. It is easy to lose these as the box is removed from the case, as they are then no longer captive. Some meters have captive nut inserts so this problem doesn't arise.

There is often a black mastic sealing the box to the case. It's not difficult to clean off, but if you use a solvent things get a bit messy.

The last time i saw a crack like that i let some superglue wick into it then trimmed the dried glue back with a stanley knife blade, scraping almost flat against the surface. The finish wasn't perfect but it was on quite a scruffy meter so it blended in ok.

19th Oct 2017, 5:43 pm

Don't clean off the messy painted on gunge inside the case, that is there to trap dust etc..

19th Oct 2017, 11:04 am	#1
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,178	How To Remove The Battery Cage From an AVO Meter 8? Hello, I would like to investigate a crack in the case of my newly bought AVO Meter 8. The only way to take a look would be to remove the battery cage. Since it looks bolted together I don't want to loosen the screws and hope for the best. What would be the best way to remove the battery cage? Attached Thumbnails

19th Oct 2017, 1:29 pm	#2
Barnmead Pentode Join Date: Dec 2002 Location: Norfolk, UK. Posts: 168	Re: How To Remove The Battery Cage From an AVO Meter 8? The four countersunk screws you can see have nuts on the inside. You will need a long box spanner to get the lower ones undone. Putting them back is a bit more difficult. As i recall I lashed up something with a box spanner an a piece of tubing. Hope this helps. __________________ Richard

19th Oct 2017, 2:23 pm	#3
Guest Guest Posts: n/a	Re: How To Remove The Battery Cage From an AVO Meter 8? Stick 'em (the nuts) on before reassembly.

19th Oct 2017, 5:17 pm	#4
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,103	Re: How To Remove The Battery Cage From an AVO Meter 8? On some examples one (or both?) of the dome-head screws (for the battery box cover) threads into nuts that sit in recesses in the battery box. It is easy to lose these as the box is removed from the case, as they are then no longer captive. Some meters have captive nut inserts so this problem doesn't arise. There is often a black mastic sealing the box to the case. It's not difficult to clean off, but if you use a solvent things get a bit messy. The last time i saw a crack like that i let some superglue wick into it then trimmed the dried glue back with a stanley knife blade, scraping almost flat against the surface. The finish wasn't perfect but it was on quite a scruffy meter so it blended in ok.

19th Oct 2017, 5:43 pm	#5
Guest Guest Posts: n/a	Re: How To Remove The Battery Cage From an AVO Meter 8? Don't clean off the messy painted on gunge inside the case, that is there to trap dust etc..