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National Radio MB-40-SL Multi-Band Input/Output Tank Assembly: SOLD!

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Author Topic: National Radio MB-40-SL Multi-Band Input/Output Tank Assembly: SOLD!  (Read 455 times)
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« on: March 14, 2019, 08:05:21 PM »

I am doing my annual shack cleaning and I have a used National MB-40-SL Multiband Tank Assembly. I believe it can be used in push-pull and single-ended output tank circuit designs, with an output of 40 watts or less. It can also be used in the grid input stage when the drive/input power is 40 watts or less. It has a swinging link coupling coil. I think it is best suited for use as the tuned input tank circuit for a high-power common-cathode linear or class C amplifier.

I removed this a number of years ago from a homebrew linear amplifier that ran a pair of 811As in common cathode in the output stage. It was used in the input/grid circuit.

Unfortunately, I have no other technical information available pertaining to this unit.

The price is $35.00, plus the cost of shipping to your QTH.

Please contact me at triodes@optonline.net

Thanks & 73,

Bruce, W2XR

Real transmitters are homebrewed with a ratchet wrench, and you have to stand up to tune them!

Arthur C. Clarke's Third Law: "Any sufficiently advanced technology is indistinguishable from magic".
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