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Collecting > Antique Radio & Phonographs > Re: Restoring P...
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Re: Restoring Philco 77 Console

by "Mark Oppat" <moppat@[EMAIL PROTECTED] > May 13, 2008 at 12:13 PM

yes, but fuses are somewhat unreliable too, especially if not the slow blow

type.  You can have the odd surge turn on that takes one out.  It happens.

If the correct values are used the tranny is safe.
I have done this on AK55's mostly, and no customer ever re****ted a
problem.

Mark Oppat



"nesesu" <neil_sutcliffe@[EMAIL PROTECTED]
> wrote in message 
news:40754d4d-9777-4530-9e91-63cde7af932b@[EMAIL PROTECTED]
 May 12, 7:38 pm, "Mark Oppat" <mop...@[EMAIL PROTECTED]
> wrote:
> snip <
> However (I will duck flames for this) because changing out the filters
"is
> a *****", I have "repaired" radios of this vintage and left the original
> filter caps alone, but added a separate "B+" line fuse of about 150ma. 
> This
> goes in line right where the B+ line comes off the type 80 rectifier. If
> the filter caps short, this fuse will blow. Your main AC line fuse
should
> be perhaps 1.5 amps. Either can be slow-blow if you want greater
> reliability. I would make both accessable from the outside of the
chassis,
> and label them with values of fuses. Amazingly, at least in AK55's, the
> filter caps seem to hold up well.
>
> Mark Oppat
>
> "Ian" <goo...@[EMAIL PROTECTED]
> wrote in message
> snip <

I suggest that it is a poor plan to expose the fuses. Firstly they
need to be protected from contact by a cover or by using one of the
enclosed holders, either of which affects the outward appearance of
the chassis.
Secondly, if a properly sized fuse blows, then there is something
wrong and the chassis needs to be pulled anyway to correct the
problem.
In far too many cases I have seen equipment with a small problem [such
as a shorted cap] protect itself with its fuse only to have the
exterrnal fuse replaced with a much larger value and end up being
heavily damaged [fried transformer or an internal fire].
If the chassis needs to be pulled anyway, put the fuse inside to
protect the set from well meaning users.

Neil S.
 




 16 Posts in Topic:
Restoring Philco 77 Console
Ian <google@[EMAIL PRO  2008-05-12 16:22:47 
Re: Restoring Philco 77 Console
"Keith Park" &l  2008-05-12 20:38:39 
Re: Restoring Philco 77 Console
cmdr buzz corey <cmdr-  2008-05-12 18:38:17 
Re: Restoring Philco 77 Console
"Phil Nelson" &  2008-05-12 19:04:56 
Re: Restoring Philco 77 Console
"Mark Oppat" &l  2008-05-12 22:38:21 
Re: Restoring Philco 77 Console
k9uwaREMOVE@[EMAIL PROTEC  2008-05-13 12:26:01 
Re: Restoring Philco 77 Console
goodguyy@[EMAIL PROTECTED  2008-05-14 21:00:04 
Re: Restoring Philco 77 Console
nesesu <neil_sutcliffe  2008-05-13 08:48:21 
Re: Restoring Philco 77 Console
"Mark Oppat" &l  2008-05-13 12:13:41 
Re: Restoring Philco 77 Console
philsvintageradios <ph  2008-05-13 16:14:20 
Re: Restoring Philco 77 Console
"HagstAr" <y  2008-05-14 22:41:29 
Re: Restoring Philco 77 Console
amyotte <amyotte@[EMAI  2008-05-14 06:33:29 
Re: Restoring Philco 77 Console
"Phil Nelson" &  2008-05-14 09:54:13 
Re: Restoring Philco 77 Console
Ian <google@[EMAIL PRO  2008-05-14 10:10:08 
Re: Restoring Philco 77 Console
"Phil Nelson" &  2008-05-14 10:23:42 
Re: Restoring Philco 77 Console
philsvintageradios <ph  2008-05-14 16:09:29 

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tan12V112 Sun Oct 12 8:10:11 CDT 2008.