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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
I have also wondered if a double balanced diode ring mixer with the usual ft43-10's will work in place of the modules as they are usually listed. I can make a DBDRM for a few cents compared to
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Ryan Flowers
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#249
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
Jerry, I will look at your circuit. One of things was wondering about was whether diode ring mixers would wprk in lieu of the minimodules. I suppose the only group project PCB possible would be from a
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Curt
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#248
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Re: Group Introduction: If you're going to post on the group, reply here!
Thanks for the new group. Homebrew is by far the most interesting part of the hobby. Currently working on a transceiver. It started on 40m and currently works on 60m. I plan to make it properly
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Richard Tomlinson G4TGJ
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#247
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Re: Stockton vs Resistive SWR Bridge
home brewed: http://www.learnmorsecode.com/SWRmeter/index.html
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Rob <roomberg@...>
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#246
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Re: Norcal 40a (Was Re: [qrptech] Group Introduction: If you're going to post on the group, reply here!)
The schematic IS IN the manual.? I know there was some difference to the earlier manual/schematic, I had to update my PCB design during my build. 73, Gary WB6OGD
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wb6ogd
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#245
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Re: Stockton vs Resistive SWR Bridge
Hey Gang...I've been selling Stockton Bridges since the cows came home. http://kitsandparts.com/bridge1.4.php Simple and inexpensive...you provide teh meters. 73, DIz, W8DIZ
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w8diz
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#244
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Re: Stockton vs Resistive SWR Bridge
The Sandford Wattmeter is temporarily discontinued but I believe Kanga UK may have 1 or 2 left (none in the states).? It's a fantastic power meter but does not measure SWR.? The "Oner" Stockton
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John Clements
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#243
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Re: Norcal 40a (Was Re: [qrptech] Group Introduction: If you're going to post on the group, reply here!)
Just to clarify (correct me, please, if I'm wrong):? The "RevE" designation refers only to the schematic, not to the manual. Agree--it's an excellent manual. Jerry AA6KI Tucson
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bleepingbeep
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#242
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Re: Stockton vs Resistive SWR Bridge
I have and use both types.? The resistive bridge has the advantage that the transmitter never sees an SWR above 3:1, even across an open or a dead short, so it's easier on the transmitter.? I break
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Eric Forman
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#241
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Re: Group Introduction: If you're going to post on the group, reply here!
Thank you for setting up the group.? I find that I learn more by listening than by talking, so I don't usually say too much.? I've learned a lot from this group and hope to see it continue. -Eric
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Eric Forman
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#240
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
I've built this receiver but had a few changes to Rick's design.? His diplexers were extremely complex and I ended up using a simple diplexer from "Solid State Design for the Radio Amateur"
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Jerry Wolczanski
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#239
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
Graham, your understanding is generally correct as long as it¡¯s not a ¡°derivative work¡± of Dr. C¡¯s artwork. A simple approach, of course, is to just ask Dr. Campbell if he owns the copyright
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Scott McDonald
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#238
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
Rick Campbell KK7B or if you prefer Dr. Campbell of Portland State University has published much over the years. A number of his designs were available through Kanga USA but sadly the proprietor has
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Graham <colonelkrypton@...>
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#237
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Re: Stockton vs Resistive SWR Bridge
I have the Kanga Kits Stockton bridge and it works well for testing up to 20 W output and down to 1 W. Also has an output for a scope. It is my favorite and I have 3 different SWR/dummy loads. I got
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David Wilcox K8WPE
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#236
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
Not same but might be fun: ?SOUNDSCAPE BINAURAL JOE STREET VE3VXO project : http://www.learnmorsecode.com/soundscape/index.html
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Rob <roomberg@...>
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#235
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Re: Group Introduction: If you're going to post on the group, reply here!
Ryan, Thanks for setting this up. Jerry / K0ES
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Jerry / K0ES <jkbaum@...>
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#234
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
I'm intrigued. On the Old Group, I had posted about building a homebrew phasing rig, I was reminded about the R2/T2 from KK7B. Those PDF's are at arrl.org too, and I've downloaded both of them so I
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Ryan Flowers
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#233
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
I have been thinking about a similar CW transceiver project using the phase shift design.? If you look at the schematic of the QCX at QRPLabs it uses a QSD with I and Q outputs which can run direct
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Dan Pflugrath
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#232
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Re: "A Binaural IQ Receiver" QST Mar 1999 Campbell KK7B
That article as available on the web at http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/QS03-99-Campbell.pdf Available to anyone. Mike K5ESS Sent: Monday,
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K5ESS
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#231
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Re: Group Introduction: If you're going to post on the group, reply here!
New member. Listen quite a bit, talk very little. Frank KB4VU
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Frank
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#230
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