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Re: QRPGuys DSB Digital Transceiver
Bob Macklin
Jack,
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I suspect it is people are just not trying because the bands don't have much except on contest days. I use DX Lab with DX Atlas to look at the CW/digital activity. There appears to be more activity east of the Mississippi than west of it. And there is more activity east of the Rockies than west of them. Why?? And I am using GOOD receivers. The main bands for me right now are 40M and 20M. But I would prefer 40M and 15M. I have a 40M dipole that also works OK on 15M. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "Jack via Groups.Io" <jjpurdum@...> To: <[email protected]> Sent: Sunday, November 03, 2019 7:06 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver Bob: It's very true that conditions right now suck compared to the 70's. I had regular sked's for phone patch traffic between our military personnel stationed on Guam and the Marshall Islands and their spouses left at home at Offut AFB (SAC Headquarters). However, poor conditions does NOT mean bad ham radio. Indeed, one of my club members worked 160 DX stations during the recent CQ DX contest. It may take a little more effort today than 40 years ago, but the bands still provide enjoyable QSO's if you want them. Isn't it odd the bands are moribund at "normal" times but are actually crowed on FD and other popular contests. Hmmm. I wonder...How much of this "The-bands-are-horrible" crap is because we turn on the radio, tune around for five minutes and, not hearing anything, shut down everything just so you can go upstairs and rearrange your sock drawer. I wonder what would happen if every one of us tuned around for five minutes and, not hearing anything, called CQ for five minutes before giving up? I'll bet you'd make a contact more often than not...especially if everyone else was doing the same thing. I know the science and the sun's being pretty crappy about things at the moment. Still, I wonder what would happen if... Jack, W8TEE On Sunday, November 3, 2019, 9:32:09 PM EST, Bob Macklin <macklinbob@...> wrote: Part of the problem with ham radio today is ready built radios are too expensive for a lot of us. 70 years ago we could buy a surplus BC-453 (Q5'er) for $5 and build a converter to put in front of it for another $10. Not so today. And the kits like Heathkit are long gone.The Heathkit low power transverters (HW-7, HW-8, HW-9) all go for several hundred bucks on eBay. And they are just direct conversion receivers. A good starting point is the NorCal40. It's single band but it's pretty cheap. And PCBs have been available. Now is not a good time for ham radio. We are at the low point of the solar cycle. We may have just started Solar Cycle 25. I think partially because of this the ham radio activity is at a low point. If you don't have a GC receiver there are a lot available on eBay. I like the Heathkits. I have mostly tube types but I do have a couple solid state units. They will let you listen to the activity on the bands.If you don't hear any activity on one of these you won't hear any on your QRP kit. It doesn't hurt to have a signal generator. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "chuck adams" <chuck.adams.k7qo@...> To: <[email protected]> Sent: Sunday, November 03, 2019 4:15 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver I second the notion. Build it, use it and see what it does. |
Re: QRPGuys DSB Digital Transceiver
Bob Macklin
How well does it work as a normal QRP transceiver?
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Can you use it for RTTY? Because of age I now prefer to use RTTY rather than CW. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "Jack via Groups.Io" <jjpurdum@...> To: <[email protected]> Sent: Sunday, November 03, 2019 6:46 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver All this is specious to me. If it was a kilowatt kit with the likelihood of hundreds of them operating simultaneously all over each band, then maybe it an issue. It something to experiment with for those who have the talent and time. Personally, other than knocking off awards, the allure of FT8 puzzles me. On the other hand, if someone is upset with the fact it's DSB, perhaps it will lead to hacks that cheaply change it. If you bought one, built it, use it. If it becomes a real issue, I'm sure we'll hear about it. Until then, let's put the cart back behind the horse again. Jack, W8TEE On Sunday, November 3, 2019, 5:47:18 PM EST, Randy.AB9GO <randy.ab9go@...> wrote: With all the controversy surrounding this kit I am sorry I even purchased it. It's sitting here waiting to be assembled. I suppose I'll throw the PCB boards away and keep the parts for future projects. With so many problems surrounding dsb (other than simplicity) I cannot understand why the qrpguys put this kit out. In retrospect I would have paid extra just to have a proper SSB signal after reading all the comments in this thread. Randy AB9GO |
Re: QRPGuys DSB Digital Transceiver
Bob:
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It's very true that conditions right now suck compared to the 70's. I had regular sked's for phone patch traffic between our military personnel stationed on Guam and the Marshall Islands and their spouses left at home at Offut AFB (SAC Headquarters). However, poor conditions does NOT mean bad ham radio. Indeed, one of my club members worked 160 DX stations during the recent CQ DX contest. It may take a little more effort today than 40 years ago, but the bands still provide enjoyable QSO's if you want them. Isn't it odd the bands are moribund at "normal" times but are actually crowed on FD and other popular contests. Hmmm. I wonder...How much of this "The-bands-are-horrible" crap is because we turn on the radio, tune around for five minutes and, not hearing anything, shut down everything just so you can go upstairs and rearrange your sock drawer. I wonder what would happen if every one of us tuned around for five minutes and, not hearing anything, called CQ for five minutes before giving up? I'll bet you'd make a contact more often than not...especially if everyone else was doing the same thing. I know the science and the sun's being pretty crappy about things at the moment. Still, I wonder what would happen if... Jack, W8TEE On Sunday, November 3, 2019, 9:32:09 PM EST, Bob Macklin <macklinbob@...> wrote:
Part of the problem with ham radio today is ready built radios are too expensive for a lot of us. 70 years ago we could buy a surplus BC-453 (Q5'er) for $5 and build a converter to put in front of it for another $10. Not so today. And the kits like Heathkit are long gone.The Heathkit low power transverters (HW-7, HW-8, HW-9) all go for several hundred bucks on eBay. And they are just direct conversion receivers. A good starting point is the NorCal40. It's single band but it's pretty cheap. And PCBs have been available. Now is not a good time for ham radio. We are at the low point of the solar cycle. We may have just started Solar Cycle 25. I think partially because of this the ham radio activity is at a low point. If you don't have a GC receiver there are a lot available on eBay. I like the Heathkits. I have mostly tube types but I do have a couple solid state units. They will let you listen to the activity on the bands.If you don't hear any activity on one of these you won't hear any on your QRP kit. It doesn't hurt to have a signal generator. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "chuck adams" <chuck.adams.k7qo@...> To: <[email protected]> Sent: Sunday, November 03, 2019 4:15 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver I second the notion.? Build it, use it and see what it does. |
Re: QRPGuys DSB Digital Transceiver
All this is specious to me. If it was a kilowatt kit with the likelihood of hundreds of them operating simultaneously all over each band, then maybe it an issue. It something to experiment with for those who have the talent and time. Personally, other than knocking off awards, the allure of FT8 puzzles me. On the other hand, if someone is upset with the fact it's DSB, perhaps it will lead to hacks that cheaply change it.
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If you bought one, built it, use it. If it becomes a real issue, I'm sure we'll hear about it. Until then, let's put the cart back behind the horse again. Jack, W8TEE On Sunday, November 3, 2019, 5:47:18 PM EST, Randy.AB9GO <randy.ab9go@...> wrote:
With all the controversy surrounding this kit I am sorry I even purchased it. It's sitting here waiting to be assembled. I suppose I'll throw the PCB boards away and keep the parts for future projects. With so many problems surrounding dsb (other than simplicity) I cannot understand why the qrpguys put this kit out.? In retrospect I would have paid extra just to have a proper SSB signal after reading all the comments in this thread. Randy AB9GO |
Re: QRPGuys DSB Digital Transceiver
Bob Macklin
Part of the problem with ham radio today is ready built radios are too
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expensive for a lot of us. 70 years ago we could buy a surplus BC-453 (Q5'er) for $5 and build a converter to put in front of it for another $10. Not so today. And the kits like Heathkit are long gone.The Heathkit low power transverters (HW-7, HW-8, HW-9) all go for several hundred bucks on eBay. And they are just direct conversion receivers. A good starting point is the NorCal40. It's single band but it's pretty cheap. And PCBs have been available. Now is not a good time for ham radio. We are at the low point of the solar cycle. We may have just started Solar Cycle 25. I think partially because of this the ham radio activity is at a low point. If you don't have a GC receiver there are a lot available on eBay. I like the Heathkits. I have mostly tube types but I do have a couple solid state units. They will let you listen to the activity on the bands.If you don't hear any activity on one of these you won't hear any on your QRP kit. It doesn't hurt to have a signal generator. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "chuck adams" <chuck.adams.k7qo@...> To: <[email protected]> Sent: Sunday, November 03, 2019 4:15 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver I second the notion. Build it, use it and see what it does. |
Re: Phasing SSB Transceiver: Homebrew w/o a scope?
Bob Macklin
My memory tell me the NorCal Sierra first converts the incoming signal to
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about 8MHz then the VFO is used to convert that to the 4.9MHz IF. The crystals used are 8MHz above the band lower edge. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "ajparent1/kb1gmx" <kb1gmx@...> To: <[email protected]> Sent: Sunday, November 03, 2019 4:09 PM Subject: Re: [qrp-tech] Phasing SSB Transceiver: Homebrew w/o a scope? Bob, The norcal sierra is a single conversion. The uBitx is double conversion with the 45mhz and 12/11.052 second if. the difference is notable. There are many single conversion CW radios and a few SSB radios, the CR series, KNG7A, KD1JV survivor, bitx20 come to mind for SSB. For CW the 1Watter and The Orgainc from KitsandParts.com. There are more but memory.... Allison -- Please reply on the group, no private emails we as a group get to share info that way. |
Re: QRPGuys DSB Digital Transceiver
and on a lighter note ..website american radio history" <> just uploaded about all QST mags up thru 1949 ..read Norgaard's article in July 1948 on a "phasing adaptor for ssb" ...Looks like a synchrodyne detectorto me ...
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Now to solid-state it .. Jim On Monday, November 4, 2019, 12:02:37 AM UTC, Bob Macklin <macklinbob@...> wrote:
BTW: There is no FCC rule about using DSB/SC. It was quite common in the early days of SSB. It was the suppression of the carrier that was desired. It has the same bandwidth as a normal AM signal. Except on contest days there is no problem with the extra bandwidth. and note that analog TV was VSB. One sideband with carrier. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "JT Croteau" <jt.tobit@...> To: <[email protected]> Sent: Sunday, November 03, 2019 3:42 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver LOL at Randy's post. |
Re: QRPGuys DSB Digital Transceiver
I second the notion. Build it, use it and see what it does.
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I built the kit and put it on the air and worked almost 30 Qs with it. I am not a fan of the mode after the fact. You just point and click and get a simple exchange. For $40, you do get something that does work. You guys remember the pixie? Did you get it to work as well? And, going back to the QRPGuys kit. I never received a follow up email saying I was causing problems by being on the air. I have, in the last five weeks pulled a Brian May, of Queen fame, by doing over 4,000 lines of C code and two books with more in the queue and gone back to doing physics. I have downsized the lab. I spent 26 years doing QRP stuff and it's time for me to devote time to doing physics seriously again. I've a bunch of papers to publish that I have done over the past 20 years. The EMRFD group has gone. It is time for this group to also come to and end. I do not want this group to turn into a bashing group. Too many people have their own agenda. This group is coming to its end of life. At the end of the year I will disable all posting, but the material files and messages will remain intact for the duration of the life of groups.io as long as we are not charged for the use of the space. Greed seems to be kicking in on the Internet and every one wants to make money. Feel free to start a qrp group with another name and announce it here. I will not release control of the group as I did with qrp-l. I don't want any attacks made on me for this decision. I am in control. I control the vertical. I control the horizontal. Hopefully the run was worth the humongous amount of time and energy I spent on projects and trying to stimulate the group. I kept the 20m 5W xcvr and will be on 20m trying for DXCC before I go deaf. :-) It's the last thing on my bucket list for ham radio. ciao, chuck, k7qo On 11/3/19 11:42 PM, JT Croteau wrote:
LOL at Randy's post. |
Re: QCX-40 Working...Sort of...
Chuck Carpenter
That message was mis-sent to the wrong group.
Should have been to QCXlabs.io The problem was found via a reply with links to previous messages. Cleaned up some soldering and all is well, really nice Tcvr, having fun... Chuck, W5USJ (ex K2OFN) ARCI 5422, SKCC 19956 EM22cv, Rains Co., Texas |
Re: Phasing SSB Transceiver: Homebrew w/o a scope?
ajparent1/kb1gmx
Bob,
The norcal sierra is a single conversion. The uBitx is double conversion with the 45mhz and 12/11.052 second if. the difference is notable. There are many single conversion CW radios and a few SSB radios, the CR series, KNG7A, KD1JV survivor, bitx20 come to mind for SSB. For CW the 1Watter and The Orgainc from KitsandParts.com. There are more but memory.... Allison -- Please reply on the group, no private emails we as a group get to share info that way. |
Re: Phasing SSB Transceiver: Homebrew w/o a scope?
Thank you everyone for the responses, and even a couple of private emails! I have some reading/learning to do and I'm going to have to get EMFRD from the Library again.
I also want to go with a phasing setup because I feel like it's the next bit of evolution in my understanding of radios. I think I'll start with building a DC receiver with phasing, homebrewed. It'll be some time before I get to it though, I am still working to finish a recumbent trike build :) -- Ryan Flowers W7RLF |
Re: QRPGuys DSB Digital Transceiver
Bob Macklin
BTW:
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There is no FCC rule about using DSB/SC. It was quite common in the early days of SSB. It was the suppression of the carrier that was desired. It has the same bandwidth as a normal AM signal. Except on contest days there is no problem with the extra bandwidth. and note that analog TV was VSB. One sideband with carrier. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "JT Croteau" <jt.tobit@...> To: <[email protected]> Sent: Sunday, November 03, 2019 3:42 PM Subject: Re: [qrp-tech] QRPGuys DSB Digital Transceiver LOL at Randy's post. |
Re: Phasing SSB Transceiver: Homebrew w/o a scope?
ajparent1/kb1gmx
Both are easy, just different.
The problem is the one that is least understood will be scarier. The difference is trading critical RF sections for more parts in the audio section. The big feature of phasing is they work as well at 100khz as they do at 500mhz or higher. Allison -- Please reply on the group, no private emails we as a group get to share info that way. |
Re: Phasing SSB Transceiver: Homebrew w/o a scope?
Bob Macklin
How about a double conversion Rx based on the NorCal Sierra design.
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All the crystals for the HF converter are available from Mouser or DigiKey. They are standard frequencies.You can substitute a LC bandpass filter for the 4.9MHz IF filter. Both converters can be NE-602s. Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message -----
From: "Bill Meara via Groups.Io" <n2cqr@...> To: <[email protected]> Sent: Sunday, November 03, 2019 11:51 AM Subject: Re: [qrp-tech] Phasing SSB Transceiver: Homebrew w/o a scope? Having built both a phasing receiver and many filter rigs, I think a single conversion filter rig is easier. Why not build a single conversion superhet receiver first. Good luck 73 Bill N2CQR On Sunday, November 3, 2019, 11:56:46 AM EST, ajparent1/kb1gmx <kb1gmx@...> wrote: FYI the QCX receiver is a image rejecting design (phasing) for SSB changing a few resistors in the audio filter (from CW band width to SSB) and it sounds very good. Allison -- Please reply on the group, no private emails we as a group get to share info that way. |
Re: QRPGuys DSB Digital Transceiver
JT Croteau
LOL at Randy's post.
QRPGuys aren't the only ones out there with a DSB FT8 kit. People need to get over all of this. It isn't meant to be a serious radio, it could be very fun to play with like others tinkering around with DSB voice circuits. Mine is on the bench and I will use it. On Sun, Nov 3, 2019, 17:31 jim via Groups.Io <ab7vf@...> wrote: Sad ... Still when I just looked, this is being sold to be ran under |
Re: QRPGuys DSB Digital Transceiver
Sad ... Still when I just looked, this is being sold to be ran under 'computer-control' by the "wsjt-x" program ... Not exactly rag-chew modes ....purchased a similar device (from hans summers) called "QRSS-WSPR" to do some antenna propagation messing around ...No received it yet, but ...Don't bag it, use it for what it was intended ..
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disclaimer:? I have NOT been following this thread with any active interest ...Lotsa experts out there tho (as usual) Jim On Sunday, November 3, 2019, 10:47:18 PM UTC, Randy.AB9GO <randy.ab9go@...> wrote:
With all the controversy surrounding this kit I am sorry I even purchased it. It's sitting here waiting to be assembled. I suppose I'll throw the PCB boards away and keep the parts for future projects. With so many problems surrounding dsb (other than simplicity) I cannot understand why the qrpguys put this kit out.? In retrospect I would have paid extra just to have a proper SSB signal after reading all the comments in this thread. Randy AB9GO |
Re: QRPGuys DSB Digital Transceiver
Adam Rong (BD6CR) wrote this in his manual for his D4D/FT8 kit:
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"Do we have to worry about the unwanted Lower Side Band (LSB) and Inter-Modulation Distortion (IMD)? Maybe, but for a transmitter of 1-watt, it is not really a big problem for occasional field, SOTA or experimental purposes. Is it just a toy for a transmitter of 1-watt and only half of the effective power? Not really, as I can easily make a few QSO¡¯s as far as 1500 miles range even for 40-meter band when the propagation opens." On Sun, Nov 3, 2019 at 3:47 PM Randy.AB9GO <randy.ab9go@...> wrote:
With all the controversy surrounding this kit I am sorry I even purchased --
Larry Lovell 73's N7RGW <> Cell: 214-697-1729 |
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