Have you tried BAMA? I think they have a schematic for everything ever built that was too heavy to pick up.
Lewis
One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
SCHEMATIC:
73's de Edd
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:One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
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:Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
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:73's de Edd
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::One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
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::Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
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::73's de Edd
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on your schematic, there are some things on either side of the RF amp that look like switches or something, with a rectangle at 45 degrees, looking like it could be turned ninety degrees to reconfigure the circuit, like a switch. I don't recall seeing anything like that before. Any help?
Lewis
PS...I will finally master this new keyboard and not send blank bosts over and over.
LL
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:::One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
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:::Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
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:on your schematic, there are some things on either side of the RF amp that look like switches or something, with a rectangle at 45 degrees, looking like it could be turned ninety degrees to reconfigure the circuit, like a switch. I don't recall seeing anything like that before. Any help?
:Lewis
:PS...I will finally master this new keyboard and not send blank bosts over and over.
:LL
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::::One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
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::::Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
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I "think" tht is the wrong critter????The old radio I have is AM shortwave and only has the following tubes:
1 each 12BE6,12BA6,12AV6,50C5, and 35W4. It has 4 bands and looks somewhat like the Hallicrafters of the later 38 series. Maybe that will help a little.
::on your schematic, there are some things on either side of the RF amp that look like switches or something, with a rectangle at 45 degrees, looking like it could be turned ninety degrees to reconfigure the circuit, like a switch. I don't recall seeing anything like that before. Any help?
::Lewis
::PS...I will finally master this new keyboard and not send blank bosts over and over.
::LL
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:::::One, each………. Ehhhch---Ruhhh--- Ohhhh…. Seeeeeeexty …Geee-iant,…unitized ..one piece schema coming up …resplendently complete with hot and cold running megacycles.
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:::::Ohhhh… for the olden days of utilization of 2 frontal RF stages and 3 IF stages design.
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:::::SCHEMATIC:
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:::::73's de Edd
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:I "think" tht is the wrong critter????The old radio I have is AM shortwave and only has the following tubes:
:1 each 12BE6,12BA6,12AV6,50C5, and 35W4. It has 4 bands and looks somewhat like the Hallicrafters of the later 38 series. Maybe that will help a little.
I haven't given up on this rascal,YET! I never could locate a schematic so I replaced the paper caps and E caps one for one. The AM works fine, but the shortwave tries to pick up but I get weird noises that overcome the voices.....humms,buzzes,squeels.etc. I even used a long wire antenna. Any ideas?????
Soooooo that 60 from the “Special” aspect is a downgrade from that esteemed HRO60..much in the order as one might expect, analogous to a businessman’s coupe with a 6 cylinder and no power brakes, seats,steering or any accessories. BUT...and heavy on the BUT .....with a nice copper enhanced chassis…as in
Plus……. if anyone else needs the schematic…..here’s the negative:
73's de Edd
No problem.....hvac1947@yahoo.com. I really appreciate your help on this jewel.
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:No problem.....hvac1947@yahoo.com. I really appreciate your help on this jewel.
Have this ole radio working on all 4 bands. Picks up and sounds good. Last issue is that when I go to CWO....nothing but garbled voices and high pitch squeels. I must have something wrong somewhere. I don't know if it's the switch or another issue. Any ideas??? Time for bed bed ! Old A/C guys don't get much time to rest or work on old radios in Florida.
Mike
“ when I go to CWO....nothing but garbled voices and high pitch squeels.”
No problem therein whatsoever…..
If you would have checked its hi and low side compressor pressures, that infarcation would have easily been been confirmed !
That mode is used when you are wanting to receive either Single Side Band signals on the ham bands.
In that mode, the RFcarrier is suppressed so that it is necessary to have that CW oscillation re created
in order to then demodulate
it in the conventional manner as standard AM is using.
With the CWO turned on and then one carefully tuning in to either the low or high band SSB carrier and
Then having it heterodyne
against that CW RF signal will reinstate the reception of a properly intelligible
signal. OTHERWISE, with out using the CW oscillator,
those SSB transmissions will sound like Donald
Duck talk.
The other situation for its use is in the reception of weak CW or code…dit dah dit dit …. signals.
Now, on reception of STRONG signals,
you can make out the code as multiple audible rushes of “hiss”
BUT on weaker reception you need to turn on the CWO …also known as a
Beat Frequency Oscillator
….BFO…. so that you will then have a CW carrier present and you then slowly tune onto a code signal and a
variable
tone will be then be produced in the tuning in, with the forming of now very audible code tones.
Just leave the vernier tuning
adjustment to the station sitting at the point where the most agreeable tone to your
ears is.
Thaasit……. now you know what a CWO is and how to use it, and BTW, with it turned on you were getting
exactly what would be expected
when trying to use it on AM, with a decreasing in frequency tone produced
when tuning into a station and then a disruptive background tone
overriding the audio and finally an increase
of that tones frequency as you tune off the station and finally off from it completely.
BTW was your set in as good of a condition as the reference photos ?.
73's de Edd
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Nothing like a good education from a master of the trade!!! One would think a good A/C tech would know more about such things. Thanks to all!
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:“ when I go to CWO....nothing but garbled voices and high pitch squeels.”
:
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:No problem therein whatsoever…..
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:If you would have checked its hi and low side compressor pressures, that infarcation would have easily been been confirmed !
:
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:That mode is used when you are wanting to receive either Single Side Band signals on the ham bands.
:
:In that mode, the RFcarrier is suppressed so that it is necessary to have that CW oscillation re created
:in order to then demodulate
: it in the conventional manner as standard AM is using.
:
:
:With the CWO turned on and then one carefully tuning in to either the low or high band SSB carrier and
:Then having it heterodyne
:against that CW RF signal will reinstate the reception of a properly intelligible
:signal. OTHERWISE, with out using the CW oscillator,
:those SSB transmissions will sound like Donald
:Duck talk.
:
:
:
:The other situation for its use is in the reception of weak CW or code…dit dah dit dit …. signals.
:Now, on reception of STRONG signals,
: you can make out the code as multiple audible rushes of “hiss”
:BUT on weaker reception you need to turn on the CWO …also known as a
:Beat Frequency Oscillator
:….BFO…. so that you will then have a CW carrier present and you then slowly tune onto a code signal and a
:variable
: tone will be then be produced in the tuning in, with the forming of now very audible code tones.
:Just leave the vernier tuning
: adjustment to the station sitting at the point where the most agreeable tone to your
:ears is.
:
:
:
:Thaasit……. now you know what a CWO is and how to use it, and BTW, with it turned on you were getting
:exactly what would be expected
:when trying to use it on AM, with a decreasing in frequency tone produced
:when tuning into a station and then a disruptive background tone
:overriding the audio and finally an increase
:of that tones frequency as you tune off the station and finally off from it completely.
:
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:BTW was your set in as good of a condition as the reference photos ?.
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:73's de Edd
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If you have the "simpler" special model using only five tubes, here is its manual as a Pee Dee Eff on a link from BAMA. |
:I am very sorry to interrupt this conversation but I am trying to help my father with his nc sixty special radio gray version he inherited from my grandfather I need a manual as well and would greatly appreciate any help or direction. Thank you so much.
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