Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
1971 Bush CTV1120
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
1971 Bush CTV1120
BIG Zinc Air Cells
If you have an old Electric Tick Tock that uses Flag (#6, R40) you can use Zinc Air 90AH "R40" size cells. Only from factory, but a 7.5V 90AH Round Fencer has 5. Open it up and block the air holes on the spares with bungs till needed.
The largest single cell isn't the Flag any more
http://www.lubacell.com/en/index.php?go=12
Weight: 1.2 ± 0.1 kg
Length: 82 ± 1 mm
Width: 82 ± 1 mm
Height: 182 ± 1 mm
A Flag is about 61 mm diameter and 163mm high including terminals.
Unsurprisingly the rectangular 9V 90AH are really 8.4 (Zinc Air) and very like 3 x 2 off "Type O" cells in a box. The "Type O" seems to be a squared off Flag / #6.
The first Zinc Air Batteries were made in 1932 by US Eveready (National Carbon Company / Union Carbide), now Energiser owned by Purina Pet foods. They were for "Farm Radio" batteries as well as other applications, though how exactly I don't know as they are 1.35 to 1.4V per cell. I suppose 3 is OK for 4V valves (Lead Acid 4V is actually approximately 4.5 down to 3.6) as it would be 4.2V down to 3.6V.
4V was more popular in USA and mainland Europe than 2V for battery valves.
It was the 1980s when they figured out how to make hearing aid versions.
In theory the dead Fencer batteries I have acquired to discover the insides could have the zinc paste refilled! Nice big carbon rods.
http://en.wikipedia.org/wiki/Zinc%E2%80%93air_battery
Actually one cell is quite a friendly way to run 1.4V battery valves. Retail the AR40 from a 5AR40 "7.5V" 90AH fencer work out at €6 each if you can seal the unused ones till needed. A 996 pack gives about 40AH if you wire the cells in parallel. But while the regular price is about €5, They are on sale as low as €2! But the Zinc Air are like a 1.35V to 1.4V PSU so the performance is far better to the end.
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