HR-10 Circuitry

[Mark S Graalman]

  It appears the on HR-10 schematic that the tube pins are
drawn correctly BUT the drawing of the actual tube element
connections to the pins is wrong. A 35 year old typo!

Mark  WB8JKR


On Thu, 3 Feb 2000 08:33:27 -0800 "Jack Barnes"
<jackdanielb at worldnet.att.net> writes:
>Hi Mark,
>I checked my HR-10 schematic and looked at V3 the IF amp, a 6BA6, and
>it
>shows the wiring correct. I also checked my tube manual for the
>pinouts and
>that checks OK. My HR-10 works real well for it's design.
>
>Jack WA7KMR
>
>
>----- Original Message -----
>From: Mark S Graalman <wb8jkr at JUNO.COM>
>To: <HEATH at LISTSERV.TEMPE.GOV>
>Sent: Wednesday, February 02, 2000 5:17 PM
>Subject: HR-10 Circuitry
>
>
>>   Hi All,
>>
>>
>>   I have a question, I hope its not a dumb one! I was casually
>looking
>> at the diagram tonight of the HR-10 receiver and I saw something I
>> never noticed before, The first I.F. stage is a 6BA6 and they have
>it
>> wired with G1 (control grid) as the screen and G2 (screen grid) as
>the
>> control grid. I looked at the under chassis pictorials and the
>actual
>> wiring
>> and it is not an error in the manual. Can anyone shed any light as
>to why
>> this
>> was done? Seems to me the physical placing of the grids would be the
>> supressor closest to the plate, then the screen, then the control
>grid
>> closest
>> to the cathode, and if that's the case this configuration would put
>the
>> screen
>> in between the acting control grid and the cathode! I REALLY hope
>this
>> ain't
>> a dumb question BUT............
>>
>> Mark  WB8JKR
>>
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