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need manual and schematic for a National RCQ




 
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Author Topic: need manual and schematic for a National RCQ  (Read 756 times)
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markapSWL
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« on: May 18, 2018, 07:54:31 PM »

Hi,
I recently acquired a National RCQ boat anchor which I'd like to restore.  It appears to be  pretty complete (but filthy) except for missing the plug in crystal.
I know this is a National NC-100 variant modified for the CAA by National Electrical Machine Shops  in 1948.  I've downloaded a fine manual for a similar (but not the same) RCP model which was online (to help me get started).

However, I'd really love to get a copy of the schematic and manual for the RCQ version.  I'm not an expert on these types of sets and don't want to screw up the rebuild by not having a proper schematic and manual.

Thanks,
Mark in Prescott AZ


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N8ETQ
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Mort


« Reply #1 on: May 18, 2018, 09:13:35 PM »

loos like a NC101 2 me..
Had an RCP which was a
nc 101 modified by the
Shutig Co. for noise squelch.
Damn fine RX..  The movable
coil catacomb was/is kool.

/Dan




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w8khk
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This ham got his ticket the old fashioned way.


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« Reply #2 on: May 18, 2018, 10:37:26 PM »

I looked at my receiver and it is an RCP, not an RCQ.   I also have the original manual for the RCP, matching serial number, and maintenance log is rather complete.  As far as I can tell, the RCP and RCQ look identical.  Mine has the carrier operated audio squelch relay, I do not know if the RCQ includes that mod.

The front panel looks identical to pictures of the RCQ, including the C.O.N.S and XTAL/TUNE-ABLE switch and crystal (behind the panel). 
Mine has the modification legend attached to the front, identical to the one in the radioblvd link below.

From reading, it appears that most or all RCQ receivers were modified under contract from either the RCL or RCK version receiver.

Here is a link that might provide a manual for the RCQ...
https://www.radiomuseum.org/r/national_communications_receiver_r.html

The RadioBlvd site has a wealth of information on the Airline Receivers and predecessors.  At this link I noticed the author, Henry, WA7YBS says he has an original RCQ manual for his receiver...

http://www.radioblvd.com/NC100.htm

It appears he still has an active call, you might wish to contact him.

Good Luck with your project!
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Rick / W8KHK  ex WB2HKX, WB4GNR
markapSWL
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« Reply #3 on: May 18, 2018, 10:53:42 PM »

Thanks for the comments and the links.  None of them provided a schematic and/or manual, so still looking for that.
Can anyone tell me how to go about trying to contact Henry, WA7YBS , to see if he has a digital copy of the RCQ manual?

Thanks,
Mark
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KD6VXI
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Making AM GREAT Again!


« Reply #4 on: May 18, 2018, 11:37:51 PM »

Try hiscall@gmail.com


I didn't put his actual email address due to spam.

--Shane
KD6VXI
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markapSWL
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« Reply #5 on: May 18, 2018, 11:44:13 PM »

Shane,
Thanks for the info.  I sent an e-mail to Henry and hopefully he can help me.
Regards,
Mark
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Tom WA3KLR
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« Reply #6 on: May 19, 2018, 10:25:44 AM »

Here's my RCQ schematic.  Unfortunately it is 4 parts - print and tape together.
4th part in following post.


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73 de Tom WA3KLR  AMI # 77   Amplitude Modulation - a force Now and for the Future!
Tom WA3KLR
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« Reply #7 on: May 19, 2018, 10:26:33 AM »

Here's RCQ 4th part.

And I started a thread 12 years ago on my NC-100 variant:

http://amfone.net/Amforum/index.php?topic=8409.0



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73 de Tom WA3KLR  AMI # 77   Amplitude Modulation - a force Now and for the Future!
markapSWL
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« Reply #8 on: May 19, 2018, 12:30:11 PM »

Tom, thank  you for the schematic scans.  They will be a big help.
Can anyone summarize what the differences between a  National RCP (about 1945)  and a slightly later RCQ (about 1948) would be?
I believe that a 6C5 tube was changed to a 6H6 for the second detector but not sure about other changes.
Regards,
Mark
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