Heath 2'er & IM58

[William Lockwood]

Gang, you can get a manual for the IM-58 from A.G. Tannenbaum. Thats were I
got mine.

73  Bill



 11:54 AM 3/8/98 -0800, you wrote:
>These are for *trade* or *trade + cash difference*.  I would prefer
>swapping for something at Foothill Swap next week.  I just decided
>that I can't collect everything, so Heath's are out.  I am interested
>in Tektronix plug-ins, RF oscillators, other test equipment, and
>some boatanchors (a CW-only transmitter, for example).  Anything
>made by RME.
>
>I have a Heath 2'er (2-meter regenerative tranceiver) and a
>Heath IM-58 (Harmonic Distortion Meter), both in good condition.
>
>I picked up both some time ago at Foothill, and have never powered
>either one up.  If you only want working equipment, then you can
>take them home to test them.  (On the other hand, if you can't fix
>them, perhaps you should consider some other hobby.)
>
>I checked the tubes of the 2'er at some point, added a power plug,
>microphone, and manual.  I have no other 2M AM equipment to test it.
>
>The IM-58 is probably very rare, since I have never found a manual.
>Here is a description:
>
>    It will measure harmonic distortion over the audio range.  You need a
>    low distortion audio oscilator to go allow with it.  I can write up
>    some operating instructions if you like.  I've used mine several times
>    check out hifi systems.  Lately, I've been using is to check out some
>    radios for packet.  It works as an audio notch filler. Thus letting
>    though only the components of the signal that are not at the notch
>    frequency.  An audio volt meter is used to measure the signal level
>    of all the signals not at the input frequency (i.e. the notch
>    frequency) to the device under test.  The ratio of the total signals
>    less the input signal to the total signal is the harmonic distortion.
>    For example, if you input 1 KiloHz to a device and the output is 1
>    volt.  If the output is 0.01 volts after notching out the 1KiloHz
>    signal, then the distortion is 1%, (0.01/1 in per cent)
>                        Stephen(Steve) Schwarm, W3EVE
>
>I also have a Heath audio oscillator which could be used along with it.
>I forget the oscillator model number, but it definitely works.
>
>Brian  KD6TLA
>
>(ps -- I don't know what the difference is between "Heath" and "Heathkit",
>       so I've used them interchangeably.)
>
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