[Elecraft] K3 and Heathkit SB-610 monitor scope

[Robert Dorchuck]

The SB-610 was basically a transmit monitor scope but could
also be used to monitor receiver IF's up to 6KC (at least
according to the manual) but I have never used one that way.
In any case the IF on the K3 is to high.

Bob  W6VY


----- Original Message ----- 
From: <w5ov at w5ov.com>
To: "Dave G4AON" <elecraft at astromag.co.uk>
Cc: <elecraft at mailman.qth.net>
Sent: Wednesday, April 29, 2009 10:07 AM
Subject: Re: [Elecraft] K3 and Heathkit SB-610 monitor scope


>
> The SB610 is a transmit monitor scope. It is not a bandscope. The 
> model
> SB620 was a bandscope.
>
> The SB610 is still very useful for monitoring your transmit signal 
> through
> an amplifier for proper modulation and trapezoidal waveforms etc. 
> Good
> luck finding parts.
>
> 73,
>
> Bob W5OV
> ex- "One of the Hams at Heath"
>
>
>
>> James I am not sure you will get value for money from an SB-610, 
>> they
>> date from the days when a decent oscilloscope was big and 
>> expensive.
>> These days 'scopes with the capabilities to monitor your peaks are
>> general purpose test items and don't cost much. The K3 also has a 
>> two
>> tone test oscillator built in. The IF output of the K3 is quite low
>> level and is centred on 8.215 MHz, not the final IF of 15 KHz.
>>
>> For my money, I would look for a general purpose oscilloscope for 
>> the
>> shack and an SDR receiver ranging from the low cost Softrock IF, to
>> LP-PAN or the more expensive general coverage ones. These will give 
>> you
>> a panoramic view of the band and be far more useful than an SB-610, 
>> even
>> if it could be converted to work at the K3 IF output.
>>
>> 73 Dave, G4AON
>> K3/100 #80, Perseus SDR
>> http://www.astromag.co.uk/k3/
>> ----------------------------------
>> I'm not very familiar with using monitor scopes, so please bear 
>> with me.
>> I'm interested in picking up a used Heathkit SB-610 in order to 
>> monitor my
>> sideband wave forms. From what I understand, all I'd need to do is 
>> connect
>> the antenna out of the K3 to the SB-610, and the antenna input to 
>> the
>> SB-610.
>>
>> Can anyone with experience with this scope know if it will work 
>> well with
>> the K3? I think this SB-610 has a 455KHz coil installed as well. I 
>> do
>> believe they can be switched out for a 4-6KHz coil for monitoring a
>> receiver's final IF. I don't recall what the final IF of the K3 is
>> operating at.
>>
>> 73 de James K3JPS
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>
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