[Boatanchors] RME4350

[mac]

Reading the schematic from BAMA the xtal calibrator is a 6CB6 (V10).   
The triode side of V9 (6U8), the second mixer, is also a crystal  
oscillator but not a "calibrator" and removing V9 would certainly  
cause the radio to go dead.

Dennis D.  W7QHO
Glendale, CA

********************
On Oct 12, 2013, at 10:48 AM, Grant Youngman wrote:

> Is the calibrator with the 6U8 located on the right front side of  
> the chassis as shown in the 4350A manual (e.g. BAMA), or somewhere  
> else?
>
> Grant NQ5T
>
>
> On Oct 12, 2013, at 11:55 AM, Al Parker <anchor at ec.rr.com> wrote:
>
>> Hi George,
>> 	That's strange, to use a 6U8 in a calibrator.  It's a dual tube,  
>> triode and pentode, usually used as a "convertor" or where the  
>> triode is the oscillator and the pentode the mixer.  Maybe it just  
>> uses the triode secn, a calibrator rarely uses/needs an amp after,  
>> which the pentode could provide.
>> 	Also strange that it's on all the time, and that the rcvr quits  
>> hearing when you remove the tube.
>> 	Have you googled and looked at all the skem's that are out there  
>> to see if anything matches what you have?
>> 	Lotsa strange things I think.
>> 73,
>>
>> Al, W8UT
>> www.boatanchors.org
>> www.hammarlund.info
>>
>> "There is nothing -- absolutely nothing -- half so much
>> worth doing as simply messing about in boats"
>> Ratty, to Mole
>>
>> On 10/12/2013 12:13 PM, george frost wrote:
>>> The 4350 that i have has a crystal calibrator that is original and  
>>> has a 6u8 tube.The calibrator is on all the time and when I pulled  
>>> the tube the radio stopped.No switches anywhere to turn it off.I  
>>> would like to get a schematic for this receiver that has the 6u8  
>>> tube located in the calibrator.The schematic from bama shows it to  
>>> be a 6cb6 but the top chassis layout shows the 6u8....KF9WV
>>> ______________________________________________________________
>
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