[GreenKeys] 2 1/2A SCREW IN FUSE

Sat Aug 12 16:19:45 EDT 2017

     That would be a very wise move. I do wonder if a transformer that 
size would draw enough parasitic load on the primary to be a noticable 
waste when the loads are off, unless you turn the feed to the 
transformer off when you are not using the reduced voltage.

      Bruce gentry, KA2IVY

On 8/12/17 3:58 PM, Pete Lancashire wrote:
> In the planning for  my electrical upgrade for my 50's house, iI have 
> included a small breaker panel that will fed with a 40A auto 
> transformer I've had in storage for years
>
> On Sat, Aug 12, 2017 at 12:41 PM, Bruce Gentry <ka2ivy at verizon.net 
> <mailto:ka2ivy at verizon.net>> wrote:
>
>     I have taken the blown fuses, torn the cap off, and used the body
>     to make an adapter for a cartridge fuse holder. If you look for
>     the kind of fuse holder with the spring in the cap so the
>     terminals don't move when the fuse is installed, you can secure it
>     in the old fuse base with epoxy. It opens up a far wider choice of
>     fuses. Motors blowing fuses brings up another concern - design
>     voltage. If the synchronous motors are designed for 110 or 115
>     volts at 60 cycles, the common 120-125 seen today in many places
>     can certainly cause over current and overheating. The smaller 
>     motors in the newer machines and the Mite are designed to nearly
>     fully saturate the magnetic structure in the motor, and a few
>     volts over rating can send the current very high. Even the larger
>     motors in the model 15 and 19 can be overheated to a lesser
>     degree. The governed motors should not be affected by this rise in
>     voltage.
>
>          Bruce Gentry, KA2IVY
>
>
>     On 8/12/17 3:20 PM, drlegendre . wrote:
>>     I can certainly understand why one might want to have at least
>>     one correct, original fuse for completeness' sake, but I can't
>>     imagine why you'd want to actually +run+ these old fuses when
>>     it's so easy to adapt a cheap, modern AGC-type glass cartridge fuse.
>>
>>     Should something go wrong, I don't see the point in burning
>>     through costly / NOS / vintage fuses.  It's also much easier to
>>     temporarily up-rate the fuse for diagnostic purposes.
>>
>>     On Sat, Jul 29, 2017 at 6:49 PM, <hwhall at compuserve.com
>>     <mailto:hwhall at compuserve.com>> wrote:
>>
>>         I mentioned that my local surplus store has a lot of those
>>         types & offered to check the amp ratings in stock &prices.
>>         Might be able to beat the e-pay price & the $8 postage but no
>>         one asked.
>>
>>         Wayne
>>         WB4OGM
>>
>>         -----Original Message-----
>>         From: Thomas Tillson via GreenKeys <greenkeys at mailman.qth.net
>>         <mailto:greenkeys at mailman.qth.net>>
>>         To: greenkeys <greenkeys at mailman.qth.net
>>         <mailto:greenkeys at mailman.qth.net>>
>>         Sent: Sat, Jul 29, 2017 7:10 am
>>         Subject: [GreenKeys] 2 1/2A SCREW IN FUSE
>>
>>         I think there was a discussion on these before and I happened
>>         to come across these on the e-pay place:
>>         http://www.ebay.com/itm/F14B-125-2-1-2A-SCREW-IN-FUSE-NEW-OLD-STOCK-1-box-of-5-PCS-/290980452933?hash=item43bfc95a45:g:YIsAAOxyAc1SOfla&autorefresh=true
>>         <http://www.ebay.com/itm/F14B-125-2-1-2A-SCREW-IN-FUSE-NEW-OLD-STOCK-1-box-of-5-PCS-/290980452933?hash=item43bfc95a45:g:YIsAAOxyAc1SOfla&autorefresh=true>
>>         No connection.
>>         Tom Tillson
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