[Boatanchors] A NC-120 find

[mac]

Pete,

Looks just like an RAO-7 I  had a while back except the -7 may not  
have had the s-meter (don't recall for sure).  The add-on coil  
honeycomb seems to be in place.  Substituted an 6AC7 in the first RF  
stage and used mine very effectively on 10M AM back in the 80s.  Not  
much bandspread, though.  Also an into a problem with DC leakage on a  
phenolic board in the main coil honeycomb screwing up the AGC.  Pile  
of old paper caps there that probably need replacing by now.

Dennis D.  W7QHO
Glendale, CA

**************
On Dec 22, 2012, at 7:31 PM, Pete Lancashire wrote:

> Looking at the references here's what I'm down to
>
> Made by National RAO RAO-1 RAO-2 RAO-6 RAO-7 RAO-9
>
>
> Says "National High Frequency Receiver NC-120" on front
>
> Has S Meter
>
> Two RF's / back porch
>
> Has SO-239 Panadapter
>
> So it is a RAO-6 S/N between 1 and 200 ?
>
> looks like has the add-on box mounting although the box is missing
>
> But has the twist-lock power connector that is associated with the
> higher s/n's ...
>
> So a mix of low s/n RAO-6, higher s/n RAO-6
>
> Why do people take ID plates off specially when not in the way or
> visible .. sigh
>
> -pete
>
>
>
>
>
>
>
> On Sat, Dec 22, 2012 at 6:06 PM, Chuck McGregor <cbmcgr at gmail.com>  
> wrote:
>> Pete-
>> I think what you have isn't exactly an NC-120,  but rather a Navy  
>> RAO, also
>> called CNA-46187.
>> It is distinguished by the extension cobbled onto the rear of the  
>> receiver
>> to house an RF isolation stage. Tags varied  from purchase order to  
>> purchase
>> order, but the RAO-2 example attached is typical.  I've attached a  
>> partial
>> copy of the RAO-3, RAO-4 manual.  The RAO-2 manual is available at  
>> BAMA.
>>
>> Here's a very informative link:
>> http://www.ohio.edu/people/postr/bapix/NC120RAO.htm
>>
>> 73,
>> Chuck K7MCG
>>
>> On Sat, Dec 22, 2012 at 3:19 PM, Pete Lancashire <pete at petelancashire.com 
>> >
>> wrote:
>>>
>>> Duh .. this should help
>>>
>>>
>>> https://plus.google.com/u/0/photos/111617808980322733757/albums/5824906224870587761
>>>
>>> On Sat, Dec 22, 2012 at 3:12 PM, Pete Lancashire
>>> <pete at petelancashire.com> wrote:
>>>> I've ended up with a NC-120 for $30 and the cost of a gallon of gas
>>>>
>>>> Sadly one of the things missing the ID plate on the lid.
>>>>
>>>> I've never been up close to one and wonder if someone that has can
>>>> tell me about this one.
>>>>
>>>> What's missing, does not look right etc.
>>>>
>>>> Other comments are most welcome.
>>>>
>>>>
>>>> -pete
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