[TenTec] Fwd: Re: Paragon PBT board (81333) Schematic

[Anthony Bowyer]

  Here are some correction to my previous post. The
copy of the schematic was a bit blurry, but the person
who sent it to me (MIKE SOUHRADA) was kind enough to
send me the corrections.

C22 is 1-6pf on BOTH boards

Q3, Q4, and Q7 are MPS3693 instead of 3893


One other thing: Even though the second 220pf
capacitor on L& doesn't show in the schematic for the
81333, it does seem to be on the board layout as C59.
It's in the same place as it is on the 81460, just the
part designator is different.

There are several part designators that are different
between the boards.

--- Anthony Bowyer <adb1x1@yahoo.com> wrote:
> Date: Wed, 8 Jan 2003 10:04:05 -0800 (PST)
> From: Anthony Bowyer <adb1x1@yahoo.com>
> Subject: Re: Paragon PBT board (81333) Schematic
> To: tentec@contesting.com
> 
> Someone has sent me the schematic. Thank you to
> those
> who responded. For those of you who might be
> curious,
> there are basically 4 differences between the 81333
> (Paragon) and 81460 (Omni V):
> 
> 1. There is an additional 'filter' selection (6khz).
> It's really no filter at all, just a pass through
> with
> the necessary diode switching support and another
> pin
> on connector 41 for it's selection.
> 
> 2. C22, the trimmer cap for the 15.302.3 adjust
> setting, is 1-5pf on the 81333 and 1-6 on the 81460.
> Actually the 81333 says "15.301.6 Adjust" and the
> 81460 says "15.302.3 Adjust". Seems there's more PBT
> range in that direction for the Omni V.
> 
> 3. Relating to (2) above, the crystal, Y1 is 15.301
> on
> the 81333, but 15.302.3 on the 81460. 
> 
> 4. L17 has a 220pf capacitor on the Q10 side on the
> 81333. It has a 220pf cap on both sides on the
> 81460.
> 
> Q3, Q4, and Q7 have different designators between
> the
> boards. On the 81333 they are MPS3893, and on the
> 81460 they are 2N4124. Since there are no part
> values
> changes on any of these, I assume they are
> interchangeable.
> 
> Anthony
> 
> =====
> NT4X
> 
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=====
NT4X

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