[Test-Equipment] Hickok signal generator

[Ian Wilson]

Carl,

Please keep us updated on the 606A - I am just starting out with a 606B. So
far
I have replaced a dead 6HG7 (thought I had 4 of those; turned out to be
only 2 - and
one of those was dead also), and approximately set the Carrier Zero control
(there
was no output in the 'CW' position with the setting when I started out). I
think I need
to do all the calibration steps since the manual warns that the oscillator
level and
carrier zero controls are interdependent).

Also notice a warble on the note when listening to the calibrator (not on
zero beat,
obviously). Most of the pots in this unit are dirty.

73, ian K3IMW



On Sun, Mar 30, 2014 at 5:41 PM, Carl <km1h at jeremy.mv.com> wrote:

> My experience with "service grade" sweeper/SG is about nil as Ive either
> had access to lab grade at work or built my own collection of now
> affordable gear mostly since retiring 12 years ago.
>
> I dont know how it is up in the boonies were you live but down south is a
> goldmine of belly up auctions should you want to upgrade. Out here is
> similar.
>
> My own project today was getting started on a 50 year old HP-606A that
> started acting up, looking at the PS with a scope reveals pure uglies! And
> even one of the 12B4 regulators has an open filament, but for $30 Im not
> complaining....its easy to work on with common tubes and early film caps
> and A-B resistors that are still perfect.
>
> I might try restuffing the can electrolytics if they come apart easy,
> otherwise just put singles wherever they fit and arent heat blasted.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Brian Burns" <
> brian at lessonsinlutherie.com>
> To: "'Discussion of Electronic Test Equipment'" <
> test-equipment at mailman.qth.net>
> Sent: Sunday, March 30, 2014 5:51 PM
> Subject: Re: [Test-Equipment] Hickok signal generator
>
>
>  Hello Carl,
>>
>> ~ One limitation of the 288X is the lowest frequency is 100 kc which
>> eliminates several Halli, Hammy, and National receivers with their low
>> IF's.
>>
>> Yeah, I saw that, but I'm unlikely to go with anything other than one high
>> IF in a single conversion arrangement. If I ever decide to get another
>> boatanchor receiver, I'll send it to you for restoration!
>>
>> ~ For simply sweeping higher frequency filters I suppose a varactor pulser
>> could be used with selectable ranges and rates.
>>
>> I was hoping that the variable rate FM modulation feature would work for
>> getting a passband curve on my 'scope. I've had only a cursory glance at
>> the
>> manual, but it shows such a thing. I'm gluing up a guitar today, and
>> haven't
>> taken time to look further into it.
>>
>> Cheers,
>>
>> Brian
>>
>>
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