[Boatanchors] National NC-101 Help Needed

[Richard Knoppow]

    Just a general comment. Sometimes schematics have voltages on 
them, can be helpful. Also, for voltage charts be careful of the 
meter specified (if one is). In old sets the DC voltages were 
often measured with 1000 ohm/volt meters. A modern 20,000 
ohm/volt meter or an electronic meter will often read high. I 
discovered this in working on Hammarlund SP-600 receivers, the 
voltage charts were taken with a Weston meter of 1000 ohms/volt. 
When read with such a meter they are quite accurate but a modern 
meter may fool you.

On 11/1/2020 8:19 AM, Al Klase wrote:
> Hi Joe,
>
> I dug through my National heap.  It doesn't look like they were 
> into V-R charts with their pre-WWII receivers.  The closest I 
> could come was the Navy RAO (National 100A).  Might be close 
> enough for government work.
> See page 42 HERE 
> <http://www.navy-radio.com/manuals/rao3-900359-4409.pdf>.
>
> Al
>
> On 11/1/2020 9:41 AM, Joe Connor via Boatanchors wrote:
>>      I'm currently working on an NC-101 (ham band only), and I 
>> need your help. I downloaded the manual from BAMA, but that 
>> manual doesn't contain any voltage or resistance charts. Does 
>> anyone know of a source for a National manual that has the 
>> voltage and resistance charts?
>>
>>      This is going to be a difficult project. I have two 
>> NC-101s, and I hope to put together one working one from the 
>> two. Each has been modified, so I'm trying to get as much 
>> information as possible on how these sets left the factory.
>>
>>      As always, thanks.
>>
>>                                  Joe Connor
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL