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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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11th Oct 2021, 12:16 am | #1 |
Heptode
Join Date: May 2005
Location: Adelaide, South Australia
Posts: 541
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Fuse confusion
The fuse at the top is your standard 3AG fuse the middle fuse is 20mm long and the last one is approx 15mm or 5/8" long - which of the 2 smaller fuses is 2AG.
I have a 1970's Rotel stereo receiver with damaged speaker fuse holders, I replaced them both with 2 mini cartridge fuse holders from my used spares box assuming them to be regular 2AG types, one of the fuses at 250mA was well under the required 1.5A and eventually blew, on trying to replace it I realised it was smaller than my 'small' 2AG fuses and I had nothing that would fit - going online I checked Ebay first - most sellers were calling the 20mm fuse 2AG - on the USA Ebay however sellers were calling a 15mmx4.5mm fuse 2AG. I couldn't locate any of the smaller fuses here in Australia and trying to track down a suitable replacement fuse online with out paying $35 for shipping became too hard and I eventually ordered a pack of 3AG fuse holders that will fit without too much modification. |
11th Oct 2021, 12:26 am | #2 |
Banned
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 2,704
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Re: Fuse confusion
SGB GLASS FUSE
Available at wescomponents.com You will need an account, and to setup an account you need an ABN. SGB.125 125mA each See More Details $ 0.25 Price / Stock Status 1 Buy SGB.315 SGB.315 315mA each See More Details $ 0.25 Price / Stock Status 1 Buy SGB1 SGB1 1A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB1.6 SGB1.6 1.6A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB2 SGB2 2A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB2.5 SGB2.5 2.5A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB3 SGB3 3A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB5 SGB5 5A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB7.5 SGB7.5 7.5A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB8 SGB8 8A each See More Details $ 0.25 Price / Stock Status 1 Buy SGB20 SGB20 20A each See More Details $ 0.25 Sorry about the layout, thats from their website. They are in sydney. They have a paper catalogue the size of a telephone directory, a mem stick and on line. To deal with them you need an account as above. I been dealing with them for 40 years. EXCELLENT company, and I am not involved with them in any way. Hope this helps Joe |
11th Oct 2021, 12:37 am | #3 |
Hexode
Join Date: Feb 2007
Location: Chesterfield, Derbyshire, UK.
Posts: 483
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Re: Fuse confusion
The fuse designation SFE-4 or AGA is 5/8" long (15.9mm) and 1/4" diameter end caps.
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11th Oct 2021, 8:38 am | #4 |
Heptode
Join Date: Sep 2009
Location: Tonbridge, Kent, UK.
Posts: 687
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Re: Fuse confusion
That smallest fuse looks like the size used in lots of Clansman ancillaries. I have not found a UK source for them.
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11th Oct 2021, 9:21 am | #5 |
Hexode
Join Date: Apr 2017
Location: Buderim, Queensland, Australia.
Posts: 428
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Re: Fuse confusion
After 60 years of fuse usage, 45 yrs in professional coms et alia maintenance, I can advise you that the best approach is to check the parts manual for type, or accurately measure the physical fuse before you go searching for replacements.
Use a vernier caliper, not a school ruler. For instance, there are 6mm fuses, and 1/4 inch fuses. It is a fuse maze out there. You will find a suitable fuse. I usually try to use original fuses, or change the holder to suit 20x5 mm (M205) or 3AG, which are common and readily available in a bewildering variety. Very good luck to you. |
11th Oct 2021, 1:47 pm | #6 |
Nonode
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 2,171
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Re: Fuse confusion
Do you require a Fast 1.5 Amp or an Anti-Surge 1.5 Amp fuse?
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11th Oct 2021, 5:22 pm | #7 |
Hexode
Join Date: Feb 2007
Location: Chesterfield, Derbyshire, UK.
Posts: 483
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Re: Fuse confusion
belling lee L562
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11th Oct 2021, 6:15 pm | #8 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,007
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Re: Fuse confusion
Yes the little ones are Belling-Lee [also made as a second-source in significant numbers by Brush Switchgear in Loughborough...] used extensively in 1950s/1960s UK military gear like the STC R4187 T1488 V-bomber transceiver and Racal RA217/MA323 RTTY receiver.
Though the fuses are now deeply obsolescent, fortunately B-L also produced panel-mount and chassis-mount fuseholders which were externally identical in appearance and dimensions but which took more-mainstream/current-production 20mm fuses. [I happily 'modernised' the holders on my RA217/MA323 purely for future convenience]
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11th Oct 2021, 8:47 pm | #9 |
Octode
Join Date: Jul 2009
Location: Cheshire, UK.
Posts: 1,740
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Re: Fuse confusion
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12th Oct 2021, 2:31 am | #10 |
Heptode
Join Date: May 2005
Location: Adelaide, South Australia
Posts: 541
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Re: Fuse confusion
hanks for all the replies and thanks Joe for the WES link - I did at one time have a WES account but now go to Wagner if I can't find what I want from Jaycar or Ebay.
The Belling Lee PDF calls them size 00, and WES components has them as SGB - what ever the 15mm fuses are called it remains that they are not readily available which is not ideal, the replacement fuse holders arrived yesterday they take the 20mm fuses, a more practical solution. |