Newbie - Looking For Info on 40m QRP CW Transceiver
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Joe <n4yg@...>
I received a homebrew QRP CW transceiver as a gift from Gary, N5PHT. I have
no information on it, but it is a great design and works great. It was built by
WB5MAJ who is now a silent key. I would very much like to obtain a schematic for
it and any other information that I can find. The following is information that
I obtained from just and inspection of the circuit board and from
operating:
40 Meters Only
IF Frequency 4 MHz
Circuit contains a crystal filter made from three 4 MHz crystals
Two additional 4 MHz crystals
Circuit has three SA612 mixer chips Output power is about 3.5 watts measured
VFO is very stable and uses varactor tuning and runs from about 3 MHz to
about 3.150 MHz
The design appears to be very similar to the “Cub” which is sold by
MFJ.
I am hoping that someone either has a schematic or article on this little
rig.
Joe, N4YG
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WA0ITP
If it has lots of parts densely packed on the board,
it might be Jim Kortge's well known 2N2/40.
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72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 2/22/2017 9:17 PM, 'Joe'
n4yg@... [4sqrp] wrote:
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Mike WA8BXN
Didn't the 2N design just use transistors and no ICs?
73/72 - Mike WA8BXN From: 4sqrp@yahoogroups.com <4sqrp@yahoogroups.com> on behalf of WA0ITP wa0itp@mchsi.com [4sqrp] <4sqrp@yahoogroups.com> Sent: Wednesday, February 22, 2017 10:52 PM To: 4sqrp@yahoogroups.com; Joe Subject: Re: [4sqrp] Newbie - Looking For Info on 40m QRP CW Transceiver If it has lots of parts densely packed on the board, it might be Jim Kortge's well known 2N2/40. 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com http://www.wa0itp.com/w8dizcntr2.jpg WAŘITP Home www.wa0itp.com WAØITP's Ham Radio Web Site Devoted to QRP Operating. On 2/22/2017 9:17 PM, 'Joe' n4yg@n4yg.com [4sqrp] wrote: I received a homebrew QRP CW transceiver as a gift from Gary, N5PHT. I have no information on it, but it is a great design and works great. It was built by WB5MAJ who is now a silent key. I would very much like to obtain a schematic for it and any other information that I can find. The following is information that I obtained from just and inspection of the circuit board and from operating: 40 Meters Only IF Frequency 4 MHz Circuit contains a crystal filter made from three 4 MHz crystals Two additional 4 MHz crystals Circuit has three SA612 mixer chips Output power is about 3.5 watts measured VFO is very stable and uses varactor tuning and runs from about 3 MHz to about 3.150 MHz The design appears to be very similar to the “Cub” which is sold by MFJ. I am hoping that someone either has a schematic or article on this little rig. Joe, N4YG
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Joe <n4yg@...>
The construction is Manhattan. There is no PC board. I can send a photo of
the unit if that would be helpful.
Joe, N4YG
From: mailto:4sqrp@...
Sent: Wednesday, February 22, 2017 10:04 PM
To: 4sqrp@... ; wa0itp@...
Subject: Re: [4sqrp] Newbie - Looking For Info on 40m QRP CW
Transceiver Didn't the 2N design just use transistors and no ICs?
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On 2/22/2017 11:38 PM, 'Joe'
n4yg@... [4sqrp] wrote:
Sounds like a home brew NorCal SST design to me or maybe something earlier than that by K1BQT. 72, Jim, K8IQY
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WA0ITP
GM Mike,
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Yes, except for the mixers. But now that I think abt it a bit more, the mixers were ADE-1 tnx 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 2/22/2017 10:04 PM, Mike WA8BXN
hubby2k@... [4sqrp] wrote:
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Jim, N5IB
That rig might be a Manhattan build of the Small Wonder Labs SW-40+ designed by Dave Benson (K1SWL)
Some years back there was an on-line tutorial on the QRP-L on Manhattan constructions where folks built up the rig in stages, I think Jim Kortge and Chuck Adams might have headed it up. I built mine for 30 meters instead. I'll post a picture - which may or may not look similar - depends on the builder. If this is indeed the rig, then the schematics are available at an archive site of the Small Wonder Labs documentation at http://smallwonderlabs.qrpradio.org/ Jim, N5IB
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Joe <n4yg@...>
Thanks Jim. Very helpful. II t turns out that this one is almost a 40+, but
not quite. The block diagram for the two would be identical, but the circuit
implementation differs quite a bit. Thanks so much for the response.
Joe, N4YG
From: mailto:4sqrp@...
Sent: Thursday, February 23, 2017 6:20 PM
To: 4sqrp@...
Subject: Re: [4sqrp] Newbie - Looking For Info on 40m QRP CW
Transceiver That rig might be a Manhattan build of the Small Wonder Labs SW-40+ designed
by Dave Benson (K1SWL)
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Jim, N5IB
Hi again Joe,
There was an SW-40 before the SW-40+ Written up in Nov 1994 QST Might be worth comparing. Another rig of similar architecture is the NorCal 40A http://www.n5dux.com/ham/files/pdf/NorCal%2040A%20Transceiver%20-%20Manual.pdf Jim, N5IB
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Joe <n4yg@...>
This is the little rig. I designed and built a frequency display for a
Heathkit HW-32a single bander several years. I made a new circuit board (very
simple) and made some simple revisions to the PIC 16F88 firmware and it
works very will with this rig. If anyone else is interested, I can provide
programmed chips and detalis and you can have one for only a few bucks.
Joe, N4YG
From: mailto:4sqrp@...
Sent: Friday, February 24, 2017 7:49 AM
To: 4sqrp@...
Subject: Re: [4sqrp] Newbie - Looking For Info on 40m QRP CW
Transceiver Hi again Joe,
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John Lonigro
Joe: If you are going to Ozarkcon, I've got 3 16F88 PICs that are brand new, which I will never use. You are welcome to them, if you want them. If Joe is NOT going to Ozarkcon or doesn't want them, I can bring
them with me to Ozarkcon for anyone who wants them. As you might gather, my goal here is NOT to spend money on postage just to get rid of these chips. I haven't checked the price of them lately, but I suspect they cost less than what shipping would be. Anyway, if anyone expresses interest in them, I'll bring them
along with me to Ozarkcon. Otherwise, I'll leave them at home. 72, John, AA0VE
On 02/24/2017 09:21 AM, 'Joe'
n4yg@... [4sqrp] wrote:
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That is a nice looking piece of gear! I was also interested in pics, but the initial cash outlay was not in the hobby budget.
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On Friday, February 24, 2017, 09:21, 'Joe' n4yg@... [4sqrp] <4sqrp@...> wrote:
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Wayne Dillon
John, If there is no interest then I would gladly offer the cost of shipping them. Your call, es thanks. 72/3 es God Bless de Wayne - NQ0RP
On Fri, Feb 24, 2017 at 9:39 AM, 'John R. Lonigro' jonigro@... [4sqrp] <4sqrp@...> wrote:
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