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Audio > Audio Tubes > Re: Hmm!
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Re: Hmm!

by "Phil Allison" <philallison@[EMAIL PROTECTED] > Apr 28, 2008 at 10:29 AM

"Trevor Wilson"
 "Phil Allison"
>
..
>>> **Depends on the fuse. I just measured half a dozen 0.25 Amp 3AG
fuses. 
>>> They ranged from 12 Ohms up to 15 Ohms. COLD.
>>
>>
>> ** That is an unbelievably high resistance value  -    not at all 
>> consistent with a 250mA fuse.
>
> **Nevertheless, it is correct.


** What is the brand of the fuses and where did you buy them ?

No brand, 1/4 amp 3AG  fuses I checked ranged from 3.5 to 4.5 ohms.

These values are at the upper limit for a  250mA rated, fast acting fuse.


These 20mm "T" or delay fuses from Bussman are speced at 0.66 ohms for a
 250mA size:

http://www.farnell.com/datasheets/81115.pdf

The specs show that R rises to 1 ohm at rated current.


** The cold value is 0.66  ohm  -  not 12 or 15 ohms.

 Your figures are completely non-typical.




.......  Phil
 




 29 Posts in Topic:
Hmm!
"Iain Churches"  2008-04-26 14:17:34 
Re: Hmm!
"Doug Bannard"   2008-04-26 09:31:11 
Re: Hmm!
"Iain Churches"  2008-05-05 20:18:09 
Re: Hmm!
"Arny Krueger"   2008-04-26 10:57:56 
Re: Hmm!
Patrick Turner <info@[  2008-04-26 16:05:56 
Re: Hmm!
"West" <west  2008-04-26 18:38:28 
Re: Hmm!
Patrick Turner <info@[  2008-04-27 12:24:23 
Re: Hmm!
RapidRonnie <rapidronn  2008-04-26 14:42:37 
Re: Hmm!
Andre Jute <fiultra1@[  2008-04-26 16:38:28 
Re: Hmm!
"West" <west  2008-04-30 06:14:31 
Re: Hmm!
"keithr" <ke  2008-05-01 08:54:09 
Re: Hmm!
Jon Yaeger <jono_1@[EM  2008-04-30 21:23:32 
Re: Hmm!
"Trevor Wilson"  2008-04-27 10:27:10 
Re: Hmm!
"Phil Allison"   2008-04-28 09:25:38 
Re: Hmm!
"Trevor Wilson"  2008-04-28 10:15:16 
Re: Hmm!
"Phil Allison"   2008-04-28 10:29:58 
Re: Hmm!
"Trevor Wilson"  2008-04-28 11:56:52 
Re: Hmm!
"Phil Allison"   2008-04-28 12:15:41 
Re: Hmm!
"Trevor Wilson"  2008-04-28 12:04:46 
Re: Hmm!
"Phil Allison"   2008-04-28 12:18:49 
Re: Hmm!
"Trevor Wilson"  2008-04-28 13:08:53 
Re: Hmm!
Patrick Turner <info@[  2008-04-28 01:01:31 
Re: Hmm!
"Arny Krueger"   2008-04-28 07:00:03 
Re: Hmm!
"Trevor Wilson"  2008-04-29 04:40:46 
Re: Hmm!
PhattyMo <phattymo@[EM  2008-04-27 15:42:58 
Re: Hmm!
Patrick Turner <info@[  2008-04-28 01:12:46 
Re: Hmm!
Andre Jute <fiultra1@[  2008-04-30 15:58:48 
Re: Hmm!
"keithr" <ke  2008-05-01 15:24:34 
Re: Hmm!
Andre Jute <fiultra1@[  2008-05-01 05:47:44 

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tan13V112 Wed Jul 23 16:10:34 CDT 2008.