[ETO_Alpha] Dead Blower on Alpha 87a

[Glenn AE0Q]

Hi to the list,

  The Alpha 89 and 87A amplifiers only have AC tap settings for 200,
220, and 240vac, there is no combination for 100 or 120 like the 91B
or 99.

  The blower motor in the 89 and 87A is a 230vac motor.

73 - Glenn AE0Q
Alpha Radio Products


On 2/13/08, Chris Codella, W2PA <w2pa at arrl.net> wrote:
> Unless the schematic in my manual is wrong, it's wired across the 220V
> primary - no center tap.  The manual also does not indicate that a 110V
> setup is even possible - specs say 190-250V only.
>
> Of course, the 87A could be entirely different.  Anybody have the manual?
>
> Chris
>
> Paul Playford wrote:
> > I think you will find the blower is 110vac and power comes from the
> > center tap of the 220vac primary.
> >
> > That way the blower will operate when the amplifier is wired for
> > 110vac or 220vac.
> >
> > de Paul, W8AEF
> >
> > ZF2JL/ZF2TA  FO8DX/FO8PLA  8Q7AA  XZ0A  VU7RG
> > soon to be TX5C
> >
> >
> > ----- Original Message ----- From: "Chris Codella, W2PA" <w2pa at arrl.net>
> > To: <ETO_Alpha at mailman.qth.net>
> > Sent: Wednesday, February 13, 2008 9:38 AM
> > Subject: [-] Re: [ETO_Alpha] Dead Blower on Alpha 87a
> >
> >
> >> Joe,
> >>
> >> I have an 89, which may have the same blower since the basic physical
> >> design is the same.  My schematic says the blower is powered by the
> >> 240V tap on the transformer (i.e. the primary).
> >>
> >> 73,
> >> Chris, W2PA
> >>
> >> Joe wrote:
> >>> My question now is whether the blower is 120VAC or is it fed through
> >>> a lower voltage?  I haven't taken the blower out of the case at this
> >>> time, pending a determination as to whether I should look at a 12
> >>> VDC path, or, if it's 120VAC, simply remove the blower and order
> >>> another one.
> >>> All thoughts are welcome.......