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Author Topic: Harvey 50 watt transmitter and Hammarlund HQ-120 articles from 1939  (Read 3037 times)
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WQ9E
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« on: October 22, 2012, 07:13:03 PM »

Two classic 1939 commercial offerings.


* Harvey 50 watt.pdf (1039.88 KB - downloaded 354 times.)
* HQ-120.pdf (703.15 KB - downloaded 278 times.)
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Rodger WQ9E
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WTF-OVER in 7 land Dennis
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IN A TRIODE NO ONE CAN HEAR YOUR SCREEN


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« Reply #1 on: October 22, 2012, 09:35:52 PM »

The HQ-120 is a sweet little receiver.  I have three of them and they are easy on the nerves and ears.

73DG
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Just pacing the Farady cage...
KM1H
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« Reply #2 on: October 25, 2012, 09:25:17 PM »

You have me beat by one, I have an early and late version. A RBG-2 fills the gap between the 120 and 129, its a nice operating radio.

Carl
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w1vtp
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« Reply #3 on: October 25, 2012, 10:41:36 PM »

So this is the precurser of the Harvey Wells TBS50 (Huh)
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Opcom
Patrick J. / KD5OEI
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« Reply #4 on: October 26, 2012, 12:23:25 AM »

That's a neat little transmitter.. 160 through 5 in one unit. plenty of 6L6's.. 500V on the 6L6 modulator plates, 300 on the screens and a 200 Ohm cathode bias resistor. 270 Ohms would be some 15W per anode and certainly class A, but this one is really pushing them to the anode rating. 6L6's must have been fairly cheap in those days or very well made.
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Radio Candelstein - Flagship Station of the NRK Radio Network.
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« Reply #5 on: October 26, 2012, 01:07:29 PM »

Dont think Ive ever seen a RK-60 used before but Raytheon was a local outfit for Harvey. A 5R4 and socket change (or rebasing) or SS would likely be needed today to keep one of those rigs working.
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