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<DIV><FONT size=2 face=Arial></FONT><FONT size=4 face=Arial>Tnx to all that
replied...Now what I need are the alignment instructions for
SB-100..</FONT></DIV>
<DIV><FONT size=4 face=Arial></FONT> </DIV>
<DIV><FONT size=4 face=Arial>Tnx</FONT></DIV>
<DIV><FONT size=4 face=Arial></FONT> </DIV>
<DIV><FONT size=4 face=Arial>Lou..</FONT></DIV>
<DIV><FONT size=4 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>----- Original Message ----- </FONT>
<DIV><FONT size=2 face=Arial>From: <</FONT><A
href="mailto:heath-request@puck.nether.net"><FONT size=2
face=Arial>heath-request@puck.nether.net</FONT></A><FONT size=2
face=Arial>></FONT></DIV>
<DIV><FONT size=2 face=Arial>To: <</FONT><A
href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2
face=Arial>></FONT></DIV>
<DIV><FONT size=2 face=Arial>Sent: Thursday, April 19, 2012 2:17 PM</FONT></DIV>
<DIV><FONT size=2 face=Arial>Subject: Heath Digest, Vol 16, Issue
17</FONT></DIV></DIV>
<DIV><FONT face=Arial><BR><FONT size=2></FONT></FONT></DIV><FONT size=2
face=Arial>> Send Heath mailing list submissions to<BR>> </FONT><A
href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><BR><FONT size=2 face=Arial>>
<BR>> To subscribe or unsubscribe via the World Wide Web, visit<BR>>
</FONT><A href="https://puck.nether.net/mailman/listinfo/heath"><FONT size=2
face=Arial>https://puck.nether.net/mailman/listinfo/heath</FONT></A><BR><FONT
size=2 face=Arial>> or, via email, send a message with subject or body 'help'
to<BR>> </FONT><A href="mailto:heath-request@puck.nether.net"><FONT size=2
face=Arial>heath-request@puck.nether.net</FONT></A><BR><FONT size=2
face=Arial>> <BR>> You can reach the person managing the list at<BR>>
</FONT><A href="mailto:heath-owner@puck.nether.net"><FONT size=2
face=Arial>heath-owner@puck.nether.net</FONT></A><BR><FONT size=2
face=Arial>> <BR>> When replying, please edit your Subject line so it is
more specific<BR>> than "Re: Contents of Heath digest..."<BR>> <BR>>
<BR>> Today's Topics:<BR>> <BR>> 1. Re: SB 100 and SB 102
(Glen Zook)<BR>> 2. Re: SB 100 and SB 102 (Brian
Wood)<BR>> 3. Re: SB 100 and SB 102 (Kenneth G.
Gordon)<BR>> 4. Re: SB-200 Part info (Kenneth G.
Gordon)<BR>> 5. Re: SB 100 and SB 102 (</FONT><A
href="mailto:G3OOU@aol.com"><FONT size=2
face=Arial>G3OOU@aol.com</FONT></A><FONT size=2 face=Arial>)<BR>>
6. Re: SB 100 and SB 102 (Kenneth G. Gordon)<BR>> <BR>> <BR>>
----------------------------------------------------------------------<BR>>
<BR>> Message: 1<BR>> Date: Thu, 19 Apr 2012 08:12:29 -0700 (PDT)<BR>>
From: Glen Zook <</FONT><A href="mailto:gzook@yahoo.com"><FONT size=2
face=Arial>gzook@yahoo.com</FONT></A><FONT size=2 face=Arial>><BR>> To:
Lou <</FONT><A href="mailto:beethoven1@sbcglobal.net"><FONT size=2
face=Arial>beethoven1@sbcglobal.net</FONT></A><FONT size=2 face=Arial>>,
"</FONT><A href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>"<BR>>
<</FONT><A href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>><BR>>
Subject: Re: [Heath] SB 100 and SB 102<BR>> Message-ID:<BR>> <</FONT><A
href="mailto:1334848349.10990.YahooMailNeo@web121701.mail.ne1.yahoo.com"><FONT
size=2
face=Arial>1334848349.10990.YahooMailNeo@web121701.mail.ne1.yahoo.com</FONT></A><FONT
size=2 face=Arial>><BR>> Content-Type: text/plain;
charset="iso-8859-1"<BR>> <BR>> First of all, the LMO in the SB-102 is
solid-state and the LMO in both the SB-100 and SB-101 are tube type.<BR>>
<BR>> Next, both the SB-101 and SB-102 came with the switch and circuitry so
that the 400 Hz CW filter can be installed. ?The SB-100 does not have
this.<BR>> <BR>> The SB-101 and SB-102 have a switch position that allows
frequency control from the external LMO (both receive and transmit) and the
SB-100 does not have this.<BR>> <BR>> There are 2 "spare" RCA jacks on the
back of both the SB-101 and SB-102 which are not present in the SB-100.<BR>>
<BR>> The SB-100 and SB-101 use a 6AU6 as the receiver "front end" and the
SB-102 uses a 6HS6 which gives a slight improvement. ?Unfortunately, the 6HS6
tubes are scarce these days and most have gone back to the 6AU6 when that tube
goes bad.<BR>> <BR>> Some SB-102 units came with solid-state LMOs not
built by TRW. ?Those non-TRW LMOs often have problems "tracking" frequency
between the 100 kHz points. ?That is, the calibration can be "way off" at the 1
kHz marks on the dial although generally accurate at the 100 kHz marks. ?The TRW
LMOs track well within 1 kHz at the points between the 100 kHz marks.<BR>>
?<BR>> Glen, K9STH<BR>> <BR>> <BR>> Website: </FONT><A
href="http://k9sth.com"><FONT size=2
face=Arial>http://k9sth.com</FONT></A><BR><FONT size=2 face=Arial>> <BR>>
<BR>> ________________________________<BR>> From: Lou <</FONT><A
href="mailto:beethoven1@sbcglobal.net"><FONT size=2
face=Arial>beethoven1@sbcglobal.net</FONT></A><FONT size=2
face=Arial>><BR>> To: </FONT><A href="mailto:heath@puck.nether.net"><FONT
size=2 face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>
<BR>> Sent: Wednesday, April 18, 2012 9:00 PM<BR>> Subject: [Heath] SB 100
and SB 102<BR>> <BR>> <BR>> <BR>> Can someone tell me the
specific differences <BR>> between the SB-100 and the SB -102..I don't have
the manual for the SB <BR>> 100....<BR>> ?<BR>> Tnx<BR>>
_______________________________________________<BR>> Heath mailing
list<BR>> </FONT><A href="mailto:Heath@puck.nether.net"><FONT size=2
face=Arial>Heath@puck.nether.net</FONT></A><BR><FONT size=2 face=Arial>>
</FONT><A href="https://puck.nether.net/mailman/listinfo/heath"><FONT size=2
face=Arial>https://puck.nether.net/mailman/listinfo/heath</FONT></A><BR><FONT
size=2 face=Arial>> -------------- next part --------------<BR>> An HTML
attachment was scrubbed...<BR>> URL: <</FONT><A
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size=2 face=Arial>><BR>> <BR>> ------------------------------<BR>>
<BR>> Message: 2<BR>> Date: Thu, 19 Apr 2012 09:21:03 -0600<BR>> From:
"Brian Wood" <</FONT><A href="mailto:wood@lpbroadband.net"><FONT size=2
face=Arial>wood@lpbroadband.net</FONT></A><FONT size=2 face=Arial>><BR>>
To: "'Lou'" <</FONT><A href="mailto:beethoven1@sbcglobal.net"><FONT size=2
face=Arial>beethoven1@sbcglobal.net</FONT></A><FONT size=2
face=Arial>><BR>> Cc: </FONT><A href="mailto:heath@puck.nether.net"><FONT
size=2 face=Arial>heath@puck.nether.net</FONT></A><BR><FONT size=2
face=Arial>> Subject: Re: [Heath] SB 100 and SB 102<BR>> Message-ID:
<</FONT><A
href="mailto:005701cd1e40$09e930f0$1dbb92d0$@lpbroadband.net"><FONT size=2
face=Arial>005701cd1e40$09e930f0$1dbb92d0$@lpbroadband.net</FONT></A><FONT
size=2 face=Arial>><BR>> Content-Type: text/plain;
charset="us-ascii"<BR>> <BR>> The SB-101 was the same as an SB-100 except
for the CW filter and the<BR>> ability to use an external LMO (the SB-640) so
you could have independent<BR>> control of transmit and receive frequencies.
There were also two new phono<BR>> jacks on the rear panel for easier
connection of the SB-610 or -620. The<BR>> SB-102 added a solid state LMO and
improved receiver sensitivity (mainly by<BR>> replacing the 6AU6 with a
6HS6), and upgrade kits for the latter improvement<BR>> were made available
for the SB-101. There was also an accessory jack on the<BR>> SB-102 that
allowed for connection of the SB-500 transverter.<BR>> <BR>> <BR>>
<BR>> Brian, W0DZ<BR>> <BR>> <BR>> <BR>> <BR>>
<BR>> From: </FONT><A href="mailto:heath-bounces@puck.nether.net"><FONT
size=2 face=Arial>heath-bounces@puck.nether.net</FONT></A><FONT size=2
face=Arial> [mailto:heath-bounces@puck.nether.net]<BR>> On Behalf Of
Lou<BR>> Sent: Wednesday, April 18, 2012 8:00 PM<BR>> To: </FONT><A
href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><BR><FONT size=2 face=Arial>>
Subject: [Heath] SB 100 and SB 102<BR>> <BR>> <BR>> <BR>> Can
someone tell me the specific differences between the SB-100 and the SB<BR>>
-102..I don't have the manual for the SB 100....<BR>> <BR>> <BR>>
<BR>> Tnx<BR>> <BR>> -------------- next part --------------<BR>> An
HTML attachment was scrubbed...<BR>> URL: <</FONT><A
href="https://puck.nether.net/pipermail/heath/attachments/20120419/2ae5f130/attachment-0001.html"><FONT
size=2
face=Arial>https://puck.nether.net/pipermail/heath/attachments/20120419/2ae5f130/attachment-0001.html</FONT></A><FONT
size=2 face=Arial>><BR>> <BR>> ------------------------------<BR>>
<BR>> Message: 3<BR>> Date: Thu, 19 Apr 2012 08:37:56 -0700<BR>> From:
"Kenneth G. Gordon" <</FONT><A href="mailto:kgordon2006@frontier.com"><FONT
size=2 face=Arial>kgordon2006@frontier.com</FONT></A><FONT size=2
face=Arial>><BR>> To: Lou <</FONT><A
href="mailto:beethoven1@sbcglobal.net"><FONT size=2
face=Arial>beethoven1@sbcglobal.net</FONT></A><FONT size=2
face=Arial>><BR>> Cc: HeathKit <</FONT><A
href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>><BR>>
Subject: Re: [Heath] SB 100 and SB 102<BR>> Message-ID: <</FONT><A
href="mailto:4F903154.32045.2C48D1E4@kgordon2006.frontier.com"><FONT size=2
face=Arial>4F903154.32045.2C48D1E4@kgordon2006.frontier.com</FONT></A><FONT
size=2 face=Arial>><BR>> Content-Type: text/plain;
charset=US-ASCII<BR>> <BR>> On 18 Apr 2012 at 19:00, Lou wrote:<BR>>
<BR>>> Can someone tell me the specific differences between the SB-100
and<BR>>> the SB -102..I don't have the manual for the SB 100....<BR>>
<BR>> There are quite a few.<BR>> <BR>> For one thing, and the most
obvious, all SB-102s used a solid-state LMO.<BR>> <BR>> There are many
differences in other parts of the various circuits. <BR>> <BR>> The AGC is
a bit different, <BR>> <BR>> the "S" meter circuitry is different (in
fact, there are at least three different "S" <BR>> meter circuits in the
SB-102s alone) <BR>> <BR>> there are certain differences in the biasing
and screen voltages for several <BR>> stages, <BR>> <BR>> the HP-23
power supply used with the SB-100 has lower B++ than the later <BR>> power
supplies, <BR>> <BR>> the SB-102 used the 6HS6 instead of the earlier
rigs' 6AU6 at the receiver <BR>> RF and 1st mixer (so did the later SB-101s
and HW-101s), <BR>> <BR>> the SB-102 has added oscillator for use with
crystal control, <BR>> <BR>> late SB-101s and all SB-102s were setup with
a molex connector and special <BR>> switching for use with either an external
LMO (the SB-640), or with <BR>> transverters, <BR>> <BR>> some SB-101s
and SB-102s had glass-epoxy rather than phenolic boards for <BR>> the small
circuit boards that contains the parts around the bandswitch, <BR>> <BR>>
if I am not mistaken, the SB-102 came stock with the 400 Hz CW filter <BR>>
whereas that was optional with the earlier rigs, <BR>> <BR>> etc.<BR>>
<BR>> I modified my first SB-100 to an SB-101 standard shortly after I got
it, but <BR>> that was at least 50 years ago, and I cannot now remember all
the changes I <BR>> made at the time.<BR>> <BR>> Perhap Bob G3OOU, or
Glenn Zook, can fill us in on more details. Both of <BR>> those folks are
experts at those rigs.<BR>> <BR>> Heathkit seems to have had particular
trouble with making the "S" meter <BR>> stable. They used several different
versions in all their SB/HW allbanders.<BR>> <BR>> Ken W7EKB<BR>>
<BR>> <BR>> ------------------------------<BR>> <BR>> Message:
4<BR>> Date: Thu, 19 Apr 2012 08:38:51 -0700<BR>> From: "Kenneth G.
Gordon" <</FONT><A href="mailto:kgordon2006@frontier.com"><FONT size=2
face=Arial>kgordon2006@frontier.com</FONT></A><FONT size=2
face=Arial>><BR>> To: </FONT><A href="mailto:rharris283@aol.com"><FONT
size=2 face=Arial>rharris283@aol.com</FONT></A><BR><FONT size=2 face=Arial>>
Cc: HeathKit <</FONT><A href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>><BR>>
Subject: Re: [Heath] SB-200 Part info<BR>> Message-ID: <</FONT><A
href="mailto:4F90318B.30676.2C49A86E@kgordon2006.frontier.com"><FONT size=2
face=Arial>4F90318B.30676.2C49A86E@kgordon2006.frontier.com</FONT></A><FONT
size=2 face=Arial>><BR>> Content-Type: text/plain;
charset=US-ASCII<BR>> <BR>> On 19 Apr 2012 at 0:25, </FONT><A
href="mailto:rharris283@aol.com"><FONT size=2
face=Arial>rharris283@aol.com</FONT></A><FONT size=2 face=Arial> wrote:<BR>>
<BR>>> <BR>>> I have an SB-200 that is missing the 10 meter 68 pf
Silver Mica cap<BR>>> for the tuned input. I just need to know the voltage
of these. 500V or<BR>>> 1KV? The rest of this amp looks like it was hardly
used! Someone had<BR>>> cut the cap out at one time. Manual just gives the
part # 20-76 and<BR>>> the 68 pf. Thanks, Bob WB2UBW<BR>>
<BR>> 500 V<BR>> <BR>> Ken W7EKB<BR>> <BR>> <BR>>
------------------------------<BR>> <BR>> Message: 5<BR>> Date: Thu, 19
Apr 2012 14:06:20 -0400 (EDT)<BR>> From: </FONT><A
href="mailto:G3OOU@aol.com"><FONT size=2
face=Arial>G3OOU@aol.com</FONT></A><BR><FONT size=2 face=Arial>> To:
</FONT><A href="mailto:kgordon2006@frontier.com"><FONT size=2
face=Arial>kgordon2006@frontier.com</FONT></A><FONT size=2 face=Arial>,
</FONT><A href="mailto:beethoven1@sbcglobal.net"><FONT size=2
face=Arial>beethoven1@sbcglobal.net</FONT></A><BR><FONT size=2 face=Arial>>
Cc: </FONT><A href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><BR><FONT size=2 face=Arial>>
Subject: Re: [Heath] SB 100 and SB 102<BR>> Message-ID: <</FONT><A
href="mailto:1d4b0.952a701.3cc1ae1c@aol.com"><FONT size=2
face=Arial>1d4b0.952a701.3cc1ae1c@aol.com</FONT></A><FONT size=2
face=Arial>><BR>> Content-Type: text/plain; charset="us-ascii"<BR>>
<BR>> <BR>> <BR>> In a message dated 19/04/2012 17:23:30 GMT
Standard Time, <BR>> </FONT><A
href="mailto:kgordon2006@frontier.com"><FONT size=2
face=Arial>kgordon2006@frontier.com</FONT></A><FONT size=2 face=Arial>
writes:<BR>> <BR>> <BR>>> Can someone tell me the specific
differences between the SB-100 and<BR>>> the SB -102..I don't have
the manual for the SB 100....<BR>> <BR>> <BR>> <BR>> <BR>>
Hi All<BR>> <BR>> One additional item is that you can use the 6AH6
instead of the 6AU6 in the <BR>> receiver RF stage but you also need to
change another 6AU6 to a 6AH6 or <BR>> use a balancing resistor on the
opposite heater rail to equalise the heater <BR>> currents - the 6AH6
requires 0.45A whereas the 6AU6 requires 0.30A. <BR>> <BR>>
Personally I find the SB-101 receiver sensitivity perfectly adequate on all
<BR>> bands except possibly 10m and with an evening noise level of S7-S8
on 80m <BR>> and 160m (special conversion) the extra gain from the 6AH6
is just not <BR>> required.<BR>> <BR>> 73<BR>> <BR>>
Bob<BR>> <BR>> Bob F Burns<BR>> C Eng, FIET, MSE<BR>> Amateur
Radio Callsign: G3OOU<BR>> Registered RSGB Instructor<BR>> G-QRP
Member No: 6907; Zone: 14, QRA: IO91WH; WAB: TQ25<BR>> Secretary of
Crystal Palace Radio & Electronics Club: _www.g3oou.co.uk_ <BR>>
(</FONT><A href="http://www.g3oou.co.uk/"><FONT size=2
face=Arial>http://www.g3oou.co.uk/</FONT></A><FONT size=2 face=Arial>) <BR>>
Technical web site: _www.qsl.net/g3oou_ (</FONT><A
href="http://www.qsl.net/g3oou"><FONT size=2
face=Arial>http://www.qsl.net/g3oou</FONT></A><FONT size=2 face=Arial>) <BR>>
-------------- next part --------------<BR>> An HTML attachment was
scrubbed...<BR>> URL: <</FONT><A
href="https://puck.nether.net/pipermail/heath/attachments/20120419/a9c1b7b2/attachment-0001.html"><FONT
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size=2 face=Arial>><BR>> <BR>> ------------------------------<BR>>
<BR>> Message: 6<BR>> Date: Thu, 19 Apr 2012 10:49:45 -0700<BR>> From:
"Kenneth G. Gordon" <</FONT><A href="mailto:kgordon2006@frontier.com"><FONT
size=2 face=Arial>kgordon2006@frontier.com</FONT></A><FONT size=2
face=Arial>><BR>> To: Glen Zook <</FONT><A
href="mailto:gzook@yahoo.com"><FONT size=2
face=Arial>gzook@yahoo.com</FONT></A><FONT size=2 face=Arial>><BR>> Cc:
HeathKit <</FONT><A href="mailto:heath@puck.nether.net"><FONT size=2
face=Arial>heath@puck.nether.net</FONT></A><FONT size=2 face=Arial>><BR>>
Subject: Re: [Heath] SB 100 and SB 102<BR>> Message-ID: <</FONT><A
href="mailto:4F905039.13110.2CC181D3@kgordon2006.frontier.com"><FONT size=2
face=Arial>4F905039.13110.2CC181D3@kgordon2006.frontier.com</FONT></A><FONT
size=2 face=Arial>><BR>> Content-Type: text/plain;
charset=ISO-8859-1<BR>> <BR>> On 19 Apr 2012 at 8:12, Glen Zook
wrote:<BR>> <BR>>> The SB-100 and SB-101 use a 6AU6 as the receiver
"front end" and the<BR>>> SB-102 uses a 6HS6 which gives a slight
improvement.<BR>> <BR>> More than "slight", in my experience and
testing...<BR>> <BR>>> ?Unfortunately,<BR>>> the 6HS6 tubes are
scarce these days and most have gone back to the<BR>>> 6AU6 when that tube
goes bad...<BR>> <BR>> ...which they do very quickly since they are
running beyond their maximum <BR>> ratings...<BR>> <BR>> I have found
that the 6AH6 will replace either the 6AU6 or the 6HS6 and will <BR>> work
better than either of the other two tubes.<BR>> <BR>> First of all, the
6AH6 is far more robust, far more easily available, and much <BR>> cheaper
than the 6HS6, and it has identical filament current requirements <BR>> and
almost identical transconductance.<BR>> <BR>> It provides almost identical
enhancement of RF gain, and the much lower <BR>> noise that the 6HS6
does.<BR>> <BR>> I use 6AH6s routinely in all SB/HW all-banders that I
restore.<BR>> <BR>> Be aware that since the filament string in the
SB-100/101/102/HW-<BR>> 100/101/101W are connected in series-parallel, that
BOTH the receiver RF <BR>> amp and the 1st receiver mixer must be exchanged
together at once, <BR>> otherwise the filament string will become
unbalanced.<BR>> <BR>> The 6AU6 draws less filament current than either of
the other two tubes <BR>> mentioned, and if you use a 6AU6 as the 1st
receiver mixer, and either the <BR>> 6HS6 or the 6AH6 as the RF amp, or vice
versa, the filament string will <BR>> become unbalanced.<BR>> <BR>>
Since the receiver RF amp and the 1st receiver mixer are on opposite sides
<BR>> of that series-parallel filament string, replacing both of those two
tubes with <BR>> tubes with higher filament current requirements will enable
the filament string <BR>> to remain balanced.<BR>> <BR>> Also, don't
forget that in the SB-102 one of the tubes was changed from a <BR>>
single-section tube to a dual-section tube, and that other section was used
<BR>> as an optional crystal oscillator for crystal control of the
transceiver <BR>> frequency.<BR>> <BR>> Ken W7EKB<BR>> <BR>>
<BR>> <BR>> ------------------------------<BR>> <BR>>
_______________________________________________<BR>> Heath mailing
list<BR>> </FONT><A href="mailto:Heath@puck.nether.net"><FONT size=2
face=Arial>Heath@puck.nether.net</FONT></A><BR><FONT size=2 face=Arial>>
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face=Arial>https://puck.nether.net/mailman/listinfo/heath</FONT></A><BR><FONT
size=2 face=Arial>> <BR>> <BR>> End of Heath Digest, Vol 16, Issue
17<BR>> *************************************</FONT></BODY></HTML>