[Harp-L] Re: Weber 5F2H Harp Amp

[Jim Rossen <jimjimdr@xxxxxxxxx>]

Final possibility is that the fuse blows because of a short in the 116
VAC circuit, which lead to blows even with the PT primaries
disconnected.

On Oct 29, 9:02 am, Jim Rossen <jimji...@xxxxxxxxx> wrote:
> To determine if the power tranny is bad in an amp that blows fuses-
> Power it up without the recto.   If fuse does not blow, there is
> probably a short in the high voltage circuit, the recto tube socket or
> the recto is bad.
> If the fuse still blows, the final test is to disconnect and isolate
> all of the secondary windings and retest. This can be done
> sequentially or all at once.   If the fuse still blows with all of the
> secondaries disconnected, the PT is bad.
>
> Weber VST sells circuit breakers that can be alligator clipped into
> the the AC supply for this testing to avoid the expense of multiple
> fuses.
>
> On Oct 28, 9:21 pm, "steve warner" <10reedsb...@xxxxxxxxx> wrote:
>
>
>
>
>
> > Hey Scooter,
> > Thanks for the heads up, but knowing Ted's tranny's and how the % of PT's
> > that have blown I just assumed it was the PT.  (you know the old saying,
> > though?  ASSUME= will make and ASS out of U and/or  ME.....lol)
>
> > I've had the original 5Y3GT in there and the last time I checked it on the
> > Hickcock, all was fine so that's why I figured it was the PT.   I checked it
> > again and is within good spec parameters.  That RCA is a great sounding
> > T-R.  Now, since your post (it got the best of my curiosity) I pulled the
> > 3A-250V fuse from my old Alamo and put in a Copper Cap WY3GT and the fuse
> > blew in 1 second.   Kinda sucks because I can't seem to  find any fuses in
> > my stash, so now I have to jump my Allied Knight PA over to one of my 3
> > remaining amps that all have no fuses in them.  DOH!!   Or head to the
> > store.
>
> > The Harmony 305A is very close to a Tweed Deluxe circuit, but it has a bit
> > more headroom. I made a few minor changes for bigger low end and with  a
> > real hot and bright element  this amp sounds very very good....5 years ago
> > on ebay for 162 bucks.  Another 110 bucks- 101A100, PT, a few caps and R's-
> >  and it sounds like my friends Tweed Harvard in a blind A/B.
>
> > catch ya later,
>
> > On Mon, Oct 27, 2008 at 7:42 PM, 10hole <10h...@xxxxxxxxxxx> wrote:
>
> > > I'm not farmiliar with the circuit Steve but if it's tube rectified, check
> > > out the rectifier before you buy a new tranny.
> > > That's another given when blowing fuses, If the rectifier arcs, the fuse
> > > blows.
>
> > > Good luck,
> > > Scooter
>
> > > Hey Rick,
> > >> Remember how I was talking about Weber's Asian Tranny's?  Well, my 61'
> > >> Harmony 305A isn't used that much at all and I've had one in there for
> > >> about
> > >> 4 years now....WELL.....it blew 2 fuses today, which usually means the PT.
> > >> There ya go.
> > >> Sucks because that's the map I use for all mic testing and I just finished
> > >> San Pedro SLim's mic and with the low end I've induced into the circuitry
> > >> it
> > >> allows me to test for the brightness and grind factor in certain elements.
>
> > >> On Sat, Oct 25, 2008 at 6:31 PM, steve warner <10reedsb...@xxxxxxxxx>
> > >> wrote:
>
> > >> Ohhhh yeah!  The 12F125-0 is a good one with very big low end!  Check this
> > >>> out....I made a 5F2H with 2-10's...1--10F150-0 and 1--10A150-0 and an
> > >>> even
> > >>> slightly bigger OT.  I made it for
> > >>> >http://bluesharpamps.blogspot.com/2008/10/weber-5f2h-harp-amp.html
>
> > >>> > A comprehensive review with sound clips will follow next week.
>
> > >>> > -Rick Davis
> > >>> > The Blues Harp Amps Blog
> > >>> >http://bluesharpamps.blogspot.com/
>
> > >>>  > _______________________________________________
>
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> > >>>>> --
> > >>>>> steve
> > >>>>>www.thunderharpmics.com
> > >>>>> fattest tone on earth!
> > >>>>> _______________________________________________
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> > >>> --
> > >>>  steve
> > >>>www.thunderharpmics.com
> > >>> fattest tone on earth!
>
> > >> --
> > >> steve
> > >>www.thunderharpmics.com
> > >> fattest tone on earth!
> > >> _______________________________________________
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>
> > --
> > stevewww.thunderharpmics.com
> > fattest tone on earth!
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