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Very nice job, Eternal Squire!

I have converted these to GIF format... you can grab them all from
--
72, Ron - W5RCM / ZS1MCD
Austin TX / Hermanus ZA


On 14 Aug 2005 08:09:23 -0000, [eternalesquire
<eternalsquire@...>] wrote: All,

I'm starting to need reading spectacles, so I took the liberty of
redrafting the schematic submitted by Mr. Farhan into a series of
modular documents that should take somewhat less effort to view finer
details such as decimal points. I tried as hard as I could to make
them reflect best engineering practices as I currently understand them.

I've incorporated what appear to be the most popular modifications
I've seen in this group to date that also keep to the spirit of
requireing only those parts reasonably obtainable in India to an
amateur of limited finances. I've also imade annotations derived
from Mr. Farhan's text where appropriate for clarity.

The source documents were drawn using the latest version of LTSpice,
available from the Linear Technology website. I then exported them
into Word bitmap files. Finally, I retouched those files to add
details not available from LTSpice, such as variable capacitors.

Please note that the LTSpice diagrams themselves are not runnable, I
merely used the tool as a drafting aid.

Please feel free to make corrections as appropriate. One thing I
would recommend is other sets of capacitor values for different IF
frequencies. I hope others will add to Table 1 in TRANSCEIVER.bmp,
more working choices for IF's besides 9 and 10 Mhz.

You'll find this archive uploaded into as EGR&#92;BITX.zip

Enjoy,

The Eternal Squire



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I don't get credit for that... eternalsquire did the work...I just
converted his BMPs to GIFs. --
72, Ron - W5RCM / ZS1MCD
Austin TX / Hermanus ZA


On 14 Aug 2005 08:24:46 -0600, [Arv Evans <arvevans@...>] wrote:
Ron W5RCM

Very good job on the schematics.? This should also help a lot for those
who want to do their BITX as modules.

Thanks,

Arv K7HKL

On Sunday 14 August 2005 08:05 am, Ron McDowell - W5RCM / ZS1MCD wrote:
>? Very nice job, Eternal Squire!
>
>? I have converted these to GIF format... you can grab them all from
> --
>? 72, Ron - W5RCM / ZS1MCD
>? Austin TX / Hermanus ZA
>
>
>? On 14 Aug 2005 08:09:23 -0000, [eternalesquire
> <eternalsquire@...>] wrote: All,
>
>? I'm starting to need reading spectacles, so I took the liberty of
>? redrafting the schematic submitted by Mr. Farhan into a series of
>? modular documents that should take somewhat less effort to view finer
>? details such as decimal points.? I tried as hard as I could to make
>? them reflect best engineering practices as I currently understand them.
>
>? I've incorporated what appear to be the most popular modifications
>? I've seen in this group to date that also keep to the spirit of
>? requireing only those parts reasonably obtainable in India to an
>? amateur of limited finances.?? I've also imade annotations derived
>? from Mr. Farhan's text where appropriate for clarity.
>
>? The source documents were drawn using the latest version of LTSpice,
>? available from the Linear Technology website.? I then exported them
>? into? Word bitmap files.? Finally, I retouched those files to add
>? details not available from LTSpice, such as variable capacitors.
>
>? Please note that the LTSpice diagrams themselves are not runnable, I
>? merely used the tool as a drafting aid.
>
>? Please feel free to make corrections as appropriate.? One thing I
>? would recommend is other sets of capacitor values for different IF
>? frequencies.? I hope others will add to Table 1 in TRANSCEIVER.bmp,
>? more working choices for IF's besides 9 and 10 Mhz.
>
>? You'll find this archive uploaded into as EGR&#92;BITX.zip
>
>? Enjoy,
>
>? The Eternal Squire
>
>
>
>? ___________________________________
>
>? Free Web Space for your Amateur Radio Hobby!
>?
>
>
>
>? YAHOO! GROUPS LINKS
>
>
>? Visit your group BITX20 on the web.
>?
>? To unsubscribe from this group, send an email to:
>? BITX20-unsubscribe@...
>?
>? Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

Yahoo! Groups Links










___________________________________

Free Web Space for your Amateur Radio Hobby!




YAHOO! GROUPS LINKS


?Visit your group "BITX20" on the web.
?
?To unsubscribe from this group, send an email to:
?BITX20-unsubscribe@...
?
?Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

Hi Arv & Ron,

It appears that the bidirectional amplifiers cannot be biased
correctly, with those 100 nf in series with the emitters. I haven't
looked, but I suspect they are in parallel with the emitter resistors
instead of series as you have them.

73,

Rob
On Aug 14, 2005, at 7:27 AM, Ron McDowell - W5RCM / ZS1MCD wrote:

I don't get credit for that... eternalsquire did the work...I just
converted his BMPs to GIFs.
--
72, Ron - W5RCM / ZS1MCD
Austin TX / Hermanus ZA


On 14 Aug 2005 08:24:46 -0600, [Arv Evans <arvevans@e...>]
wrote:
Ron W5RCM

Very good job on the schematics. This should also help a lot for
those who
want to do their BITX as modules.

Thanks,

Arv K7HKL

On Sunday 14 August 2005 08:05 am, Ron McDowell - W5RCM / ZS1MCD
wrote:

Very nice job, Eternal Squire!

I have converted these to GIF format... you can grab them all from
--
72, Ron - W5RCM / ZS1MCD
Austin TX / Hermanus ZA


On 14 Aug 2005 08:09:23 -0000, [eternalesquire
<eternalsquire@c...>] wrote: All,

I'm starting to need reading spectacles, so I took the liberty of
redrafting the schematic submitted by Mr. Farhan into a series of
modular documents that should take somewhat less effort to view
finer
details such as decimal points. I tried as hard as I could to make
them reflect best engineering practices as I currently understand
them.

I've incorporated what appear to be the most popular modifications
I've seen in this group to date that also keep to the spirit of
requireing only those parts reasonably obtainable in India to an
amateur of limited finances. I've also imade annotations derived
from Mr. Farhan's text where appropriate for clarity.

The source documents were drawn using the latest version of LTSpice,
available from the Linear Technology website. I then exported them
into Word bitmap files. Finally, I retouched those files to add
details not available from LTSpice, such as variable capacitors.

Please note that the LTSpice diagrams themselves are not runnable, I
merely used the tool as a drafting aid.

Please feel free to make corrections as appropriate. One thing I
would recommend is other sets of capacitor values for different IF
frequencies. I hope others will add to Table 1 in TRANSCEIVER.bmp,
more working choices for IF's besides 9 and 10 Mhz.

You'll find this archive uploaded into as EGR&#92;BITX.zip

Enjoy,

The Eternal Squire



___________________________________

Free Web Space for your Amateur Radio Hobby!




YAHOO! GROUPS LINKS


Visit your group BITX20 on the web.

To unsubscribe from this group, send an email to:
BITX20-unsubscribe@...

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

Yahoo! Groups Links










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--
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla College