[Test-Equipment] Hickok signal generator

[Ian Wilson]

OK.
606-B: I have just found that giving the various exposed and noisy pots a
blast
of switch has cleaned up the erratic behavior (for example, the delta-F
control
now smoothly swings the frequency through the zero-beat position. Before
blasting, it was horribly noisy, and would 'warble' in some parked
positions).

73, ian K3IMW



On Sun, Mar 30, 2014 at 6:24 PM, Carl <km1h at jeremy.mv.com> wrote:

> The B is quite different Ian, the PS and calibrator is SS and the RF
> section is rather different.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Ian Wilson" <ianmwilson73 at gmail.com>
>
> To: "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.
> net>
> Sent: Sunday, March 30, 2014 8:51 PM
> Subject: Re: [Test-Equipment] Hickok signal generator
>
>
>  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
>>>>
>>>>
>>>> ---
>>>> This email is free from viruses and malware because avast! Antivirus
>>>> protection is active.
>>>> http://www.avast.com
>>>>
>>>> ______________________________________________________________
>>>> Test-Equipment mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>>
>>>>
>>>> -----
>>>> No virus found in this message.
>>>> Checked by AVG - www.avg.com
>>>> Version: 2014.0.4354 / Virus Database: 3722/7268 - Release Date:
>>>> 03/29/14
>>>>
>>>>
>>>>  ______________________________________________________________
>>> Test-Equipment mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Test-Equipment at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>>  ______________________________________________________________
>> Test-Equipment mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Test-Equipment at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 2014.0.4354 / Virus Database: 3722/7268 - Release Date: 03/29/14
>>
>>
> ______________________________________________________________
> Test-Equipment mailing list
> Home: http://mailman.qth.net/mailman/listinfo/test-equipment
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Test-Equipment at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>