[Boatanchors] Sonar MB-611

[Glen Zook]

Is the transmitter for 10-meters or 6-meters?  Most were made for 10-meters but they could be ordered for 6-meters.  The MB-611 came out in 1946.

Suggested high voltage ranges anywhere between 250 VDC to 600 VDC at 100 mA.  This is a NBFM, actually a NBPM (phase modulated), transmitter using crystal control.  An external VFO can be used.  Uses a high impedance microphone.  The tuning controls are screwdriver "set" with "locks".  There is a dual indicator for tuning and for setting deviation.  The deviation is adjustable between 2 kHz and 3 kHz.  Power output is rated at 22.5 watts and supposedly can match any antenna!  Size is10.25 inches long by 7 inches high by 5 inches wide.  Weight is 20 pounds and it sold new for $72.45 (less power supply) in 1946.

Other than a pretty poor, very small photo, I don't have any other information on the transmitter.

As to value?  Depends on how bad someone wants it!
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: James Barrie <barrie at eos.net>
To: boatanchors at mailman.qth.net 
Sent: Wednesday, December 28, 2011 4:27 PM
Subject: [Boatanchors] Sonar MB-611
 
Have a friend who acquired one of these and I have no clue if they  
have any value. It looks complete (along with all those postage stamp  
capacitors). Found some vague specs in RigPix, but nothing much beyond  
that on the internet.
73

Jim
WA8SDF
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