Hi Skip;
I'm using an 852 in my 8877 amp (under construction)..B&W says:
2K-4K vdc
out 50-75 ohms
taps..
3.72uh / 268pf
2.34 / 144
1.34 / 73
0.95 / 36
The fellow I spoke to at B&W told me the unit was designed for 2 8877s.
If my data is incorrect (Tom ?) please let me know.
pete, kn6bi
Peter Gerba
pgerba@crl.com
On Wed, 23 Apr 1997, Bob Morris K2RK wrote:
> Skip wrote:
> >
> > Hello all,
> > I've just found the group here and signed on. I've made some measurements
> > of a B&W 852 coil assembly. Doing the paperwork with some of the values
> > I've measured and the common charts for Pi outputs, I conclude that the
> > values are pretty "general" for the advertised use.
> >
> > Instead of "tweaking" this one in, it was just easier to machine a new
> > assembly with the proper values for my circuit.
> > Has this been brought up before and have any of you experienced this same
> > issue? Although the unit I have is used, I believe it to be unmodified.
> >
> > thanks
> > Skip wv6f
> >
> > --
> > FAQ on WWW: http://www.contesting.com/ampfaq.html
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>
> Bill Orr mentions the values in one of the Handbooks, and
> the mods necessary. But just do the math. The listed values (850)
> don't "keep" the same plate impedance for each band. (?). Some were
> quite far off. As I remember doing it, remove a couple of turns and
> re-tap a couple of bands (Again on an 850).
>
> --
> FAQ on WWW: http://www.contesting.com/ampfaq.html
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
>
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