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Author Topic: An Interesting Transceiver Design  (Read 1220 times)
TANAKASAN
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Posts: 933




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« on: April 27, 2013, 01:06:25 AM »

The following link shows an interesting design for a 6m transceiver, with a little bit of work it might be adapted for use on one or more of the HF bands:

http://lea.hamradio.si/~s57nan/ham_radio/ssb_6m/ssb6m.html

The block diagram shows a unique switching arrangement for the RF and audio signals within the rig. Not only does the IF signal path completely reverse but the same connections carry both RF AND audio. Sure, we've seen bidirectional transceivers as far back as the FT101 but this, this is different.

Tanakasan
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G3TXQ
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Posts: 1524




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« Reply #1 on: April 27, 2013, 11:09:54 AM »

I don't see any "reversal" of signal flow in the IF - in his block diagram the flow is always Left to Right.

Take a look at the block diagram of an Atlas 180 from way back when:
http://atlas.wireless.org.uk/diagram1.htm

73,
Steve G3TXQ
« Last Edit: April 27, 2013, 11:12:15 AM by G3TXQ » Logged
KB1GMX
Member

Posts: 782




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« Reply #2 on: April 27, 2013, 11:44:16 AM »

I've built that and the RF always right to left.  Modulator is on the left (RX mixer) and
TXmixer is on the right(rx product detector).

Its a good design but far from unique.  It's big feature is the high level mixers (ad831s)
are far better than the much cheaper 602s.

I even published a similar design many years back similar using SA602s for lower total power
consumed.

Allison
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