[Heathkit] Heathkit SB-610, a new twist

[Dick KF4NS]

Yea Jim, I see what you mean but kind of weird though, years ago it worked just fine with my HW100 and I 
was using RG174 in the rig and RG58 as a connecting cable. Actually I believe the 610 was mostly intended 
to be used with the SB/HW Heathkit equipment. In the manual for the 610 I do not recall any mention about 
precautions concerning the results I am having.

Oh well, I will just use the 610 for xmit monitoring and forget about receive signals. I would not have 
the jewels to make a critical comment to anyone based on the display of the 610.

73, Dick KF4NS




----- Original Message ----- 
From: <heathkit-request at mailman.qth.net>
To: <heathkit at mailman.qth.net>
Sent: Saturday, June 09, 2012 12:03 PM
Subject: Heathkit Digest, Vol 101, Issue 9


<<SNIP>>|
| When replying, please edit your Subject line so it is more specific
| than "Re: Contents of Heathkit digest..."
|
|
| Today's Topics:
|
|   1. Re: Heathkit SB-610, a new twist (Jim Shorney)
|
|
| ----------------------------------------------------------------------
|
| Message: 1
| Date: Fri, 08 Jun 2012 20:54:15 -0500
| From: "Jim Shorney" <jshorney at inebraska.com>
| Subject: Re: [Heathkit] Heathkit SB-610, a new twist
| To: "heathkit at mailman.qth.net" heathkit at mailman.qth.net Message-ID: 
<20120609015424.285CC31BB3F at mail01.inebraska.com>
| Content-Type: text/plain; charset="iso-8859-1"
|
| On Fri, 08 Jun 2012 11:25:49 -0400, Dick KF4NS wrote:
|
| >Well, both are finally in real fine shape, better than new, UNTIL THIS NEW TWIST JUST DISCOVERED.
| >
| >It seems that the HW100 tap for the 610 must be terminated by 50ohms and a tuned circuit at the IF 
freq
| >of 3395khz. HMMMM, this is definitely a NEW TWIST. If my luck was not bad I would not have any at all.
|
|
| Not surprising. Nothing happens in a vacuum; when you add another circuit
| element (the 610 and cable) to the IF, you change the parameters of the
| circuit. You need to either leave the scope connected at all times, or buils a
| small solid-state buffer amp into the radio to isolate the IF from the added
| circuit element.
|
| 73
|
| -Jim
|
| --
| ?There?s something out of place ? let?s go and poke it with a stick.? ? The Doctor (Amy?s Choice 
episode)
|
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