[Heath] Need info.............

[David Erbas-White]

On 6/25/2011 6:42 AM, Jeramy Thibodeaux wrote:

Bear in mind that (particularly for items such as chokes) the tolerance 
is often +/- 20% or greater, so there really isn't a huge discrepancy 
for these parts.  In fact, if the 'optimum design value' is around 
9.65uH, then either one of these might be perfectly acceptable -- it all 
depends on the circuit.

Not having looked at the schematic for this I can't tell you what effect 
the tolerance has in the circuit, but (particularly back in Heathkit 
times) inductors were RARELY tightly-tolerance parts.

David Erbas-White

> Ed,
>
> I can see where the confusion comes in as this part number has been 
> assigned at least two different values.
>
> SB-220 Amplifier
> Part Number 45-78 is listed as 9uH RF Choke
>
> HL-2200 Amplifier
> Part Number 45-78 is listed as 10.3uH RF Choke
>
>