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Fuse size in supplied power cord

 

I checked the fuse size in the supplied power cord and it is a 10A 250v GMA glass fuse.
The manual shows a 3A fuse.
One normal way to calculate size is to use amp draw X 1.25.
3A X 1.25 = 3.75A
Round up to next value would be a 5 A.
What do you have in yours ?
Comments ?

Cecil
W4CM
 

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My power cord fuse that came with the radio is a : F3AL 250V



????? ??Sent from my iPhone.......?

On Jul 18, 2021, at 8:40 AM, mccoy635 <w4cm@...> wrote:

?I checked the fuse size in the supplied power cord and it is a 10A 250v GMA glass fuse.
The manual shows a 3A fuse.
One normal way to calculate size is to use amp draw X 1.25.
3A X 1.25 = 3.75A
Round up to next value would be a 5 A.
What do you have in yours ?
Comments ?

Cecil
W4CM

 

Cecil,

Mine from the Oct 2020 lot has the 10A/250V glass fuse.

73,
Henry - K4TMC


On Sun, Jul 18, 2021 at 11:40 AM mccoy635 <w4cm@...> wrote:
I checked the fuse size in the supplied power cord and it is a 10A 250v GMA glass fuse.
The manual shows a 3A fuse.
One normal way to calculate size is to use amp draw X 1.25.
3A X 1.25 = 3.75A
Round up to next value would be a 5 A.
What do you have in yours ?
Comments ?

Cecil
W4CM

 

Mine is a F4A250 (Fast, 4 A) glass fuse (5x20mm).

Willi
OE1WKL
 

Well that is two radios so far with 10A fuses.
I know the fuses are smaller but glass fuses that size are hard to find and costly.
I would think a mini blade fuse would be better suited.
Easier to read the values and pick the proper fuse.

Still working on the LOW S meter readings detailed in other post.
Same low readings on two new radios.
Levels fine on two other brand radios and show a S 9 with -73dBm signal.
All connectors and jumps checked.
 

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My TX-500 fuse holder contained an F3AL250V 5x20 mm glass fuse.? I was able to order spare fuses at a reasonable?price on eBay.? I got a package of 10 for $6.35 US including shipping.

Brian - K3ES
 

Amazon also has a 10 pack for $6.50.


On Sun, Jul 18, 2021, 9:07 PM Brian Manley <bdmanley@...> wrote:
My TX-500 fuse holder contained an F3AL250V 5x20 mm glass fuse.? I was able to order spare fuses at a reasonable?price on eBay.? I got a package of 10 for $6.35 US including shipping.

Brian - K3ES
 

Hello,
BRW how many A are they????

tnx 73 qro HB9GUR
 

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Phil and all,

The F3AL250V fuse is advertised as 3 amp, quick blow.? It matches the markings and size for the fuse that was shipped with my TX-500 (inside the fuse holder that is part of the included power cord).? At least with my TX-500, you need to be sure to get the 5x20 mm size fuse.? I would recommend confirming size with the fuse holder in your power cord.

Regards,

de Brian - K3ES
 

tnx a lot 73 qro HB9GUR
 

Mine is a 4A fast one as well (first European batch). Sounds reasonable to me.

BTW: These glass fuses are (or were) very common here in Europe. About 30 years ago, when working with professional electronics, they were the standard back then. I never had a problem with them, they do their job.?

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