Re: QLG1 - Clarification on what the green LED should do
Hi Steve
What value have you got in the GPS threshold register, which is register 03? You need 0 in this register for best accuracy.?
73 Hans G0UPL
On Thu, Apr 11, 2019 at 7:27 PM Steve Kavanagh via Groups.Io <sjkavanagh1= [email protected]> wrote: I confirmed this behaviour in a comparison with WWV at 5 MHz this morning. I started the Progrock without the PPS input. It started out about 10 Hz below WWV's carrier and drifted to a couple of Hz high over a few minutes. The QLG1 was then switched on. After s few minutes the Progrock stabilized at about 1 Hz below WWV, and then gradually drifted downwards, ending up between 2 and 3 Hz low after a half hour.
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Please, will you have a stand at Friedrichshafen this year?
Yes. My latest information says my stand is in the main hall at A1-608.? ? If so, are you
going to take a QSX prototype with you?
Yes
73 Hans G0UPL
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According to the Hamradio website, Hans will be at stand 604 in Hall A1
73, Dave G3VGR
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Re: U3S RF Power Transistor
@c.s.coles
this should clear it
I have U3 kit which I have modified to a U3S so I dont have any bias port on my pcb, but as you might have just remove that and put it somewhere on the chassis for easy adjustment .
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Re: QLG1 - Clarification on what the green LED should do
I confirmed this behaviour in a comparison with WWV at 5 MHz this morning. I started the Progrock without the PPS input. It started out about 10 Hz below WWV's carrier and drifted to a couple of Hz high over a few minutes. The QLG1 was then switched on. After s few minutes the Progrock stabilized at about 1 Hz below WWV, and then gradually drifted downwards, ending up between 2 and 3 Hz low after a half hour.
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Re: U3S RF Power Transistor
Hi,
His diagrams point to the low pass filters. Those are so very common they need not be included - merely mentioned. He mentions them:)
73,
Bill KU8H
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On 4/11/19 12:12 PM, J68HZ wrote: No harmonic filters?
**
*Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ*
Moderator ¨C North American QRO Group at Groups.IO.
email: bill@... <mailto:bill@...>
*From:*[email protected] [mailto:[email protected]] *On Behalf Of *Andy Brilleaux via Groups.Io
*Sent:* Thursday, April 11, 2019 5:40 AM
*To:* [email protected]
*Subject:* Re: [QRPLabs] U3S RF Power Transistor
I made an RD06HHF external amp, for my QRP Labs rigs and for general use.
I have one of my QRP Labs rigs set for about 200mw output, and pass it via a 3db attenuator.
I prefer to use an attenuator because it keeps the impedance constant at 50R regardless of frequency (RD06HHF is about 200R).
- Andy -
<> Virus-free. www.avg.com <> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
--
bark less - wag more
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A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
My completely stock QCX-17 has now made several contacts on the 20 & 30 meter bands.
Due to poor conditions only, I haven't yet had a QSO on 17 & 15, but have received many RBN spots of my QCX-17 on those bands too.
And,? the -17's receiver hears many great signals from 10000 through 15000 kHz so far.
?
All QCXs are essentially the same rig whose tuned circuits have been optimized for certain bands.
Two things I concern myself with when operating the -17 in this manner:
?
1)
Following the BNC output jack with an appropriate filter for the band I'm operating.
?
2)
Operating a VFO via internal or external means for reaching out-of-band frequencies - thankfully, Hans imposed no arbitrary freq limits.
?
BTW, my QCX-80 is much more limited in freq span.
I use it primarily as an 80m CW xcvr.
But the stock QCX-80 hears very well from, at least, 3300 to 5000 kHz.
Well, that's my story & I'm stickin' to it...
72 / 73,
Bill, N4QA
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Re: U3S RF Power Transistor
No harmonic filters? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Moderator ¨C North American QRO Group at Groups.IO. ? email:? bill@... ? ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Andy Brilleaux via Groups.Io
Sent: Thursday, April 11, 2019 5:40 AM
To: [email protected]
Subject: Re: [QRPLabs] U3S RF Power Transistor ? I made an RD06HHF external amp, for my QRP Labs rigs and for general use.
I have one of my QRP Labs rigs set for about 200mw output, and pass it via a 3db attenuator.
I prefer to use an attenuator because it keeps the impedance constant at 50R regardless of frequency (RD06HHF is about 200R).
- Andy -
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Hi Hans
?
Please, will you have a stand at Friedrichshafen this year? If so, are you
going to take a QSX prototype with you?
?
Thank you.
?
Vy 73
?
Steve, VK6VZ
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I also see this as a party not a contest. So I was more interested in how many QCX have been worked by a station than the score. If you want a score, than couldn't it be? that participants give RST plus serial Nr. and QCX give RST QCX and are counted 3 points. Multipliers by DXCC countries.
Martin
DK3UW
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Re: QRP rags to riches
#qcx
Egads! In a couple of years from now the C Programming Guide will be 40 years old! Man, I'm so glad I haven't aged during those years...
Jack, W8TEE
On Thursday, April 11, 2019, 8:32:23 AM EDT, KD8CGH <rkayakr@...> wrote:
I was lucky. There was an extension computing center in the basement of my dorm at Case (not CWRU then) in '67 with keypunches, and a window with a reader and a printer maned by a bored student. I could pad down there in my jammies at 2 a.m. to do my homework. As I recall I was an expert at duplicating a punched card just past the character I was trying to correct.
Then:
Hand soldered a mole of connections to build a Digital Group Z80 (bus but not S100) with 2K memory and computer controlled cassette tape drives. Programmed Z80 assembler
Commodore 64.? Programmed basic and 6502 assembler
Commodore Amiga: bitmapped graphics, multiwindow multitasking UNIX like OS. Programmed Fortran and FORTH, wrote a programming column for AMIGA Project magazine. The AMIGA had a modern file system, visual editor, symbolic debugger and optimizer for FORTRAN. At work I had an IBM dumb tube and a user hostile programming environment (JCL, no tools).? I wrote a transient coupled heat transfer and chemical reaction FEA code for process optimization at home and convected it to work. With the help of a plant db expert the optimizer was hidden under a simple interface for cure press operators. First deployed in '86, it's still in use in plants.
After that I convinced management to acquire some SUN workstations. That's when I started getting Jack's books that are still on my bookshelf and recently used.
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Will check :? The Issue appears to be from scores entered into 3830 manually and not understanding how it compiles total.? It would be helpful to determine how the scores were compiled/entered for the ones that appear to be incorrect.
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Re: QRP rags to riches
#qcx
I was lucky. There was an extension computing center in the basement of my dorm at Case (not CWRU then) in '67 with keypunches, and a window with a reader and a printer maned by a bored student. I could pad down there in my jammies at 2 a.m. to do my homework. As I recall I was an expert at duplicating a punched card just past the character I was trying to correct.
Then:
Hand soldered a mole of connections to build a Digital Group Z80 (bus but not S100) with 2K memory and computer controlled cassette tape drives. Programmed Z80 assembler
Commodore 64.? Programmed basic and 6502 assembler
Commodore Amiga: bitmapped graphics, multiwindow multitasking UNIX like OS. Programmed Fortran and FORTH, wrote a programming column for AMIGA Project magazine. The AMIGA had a modern file system, visual editor, symbolic debugger and optimizer for FORTRAN. At work I had an IBM dumb tube and a user hostile programming environment (JCL, no tools).? I wrote a transient coupled heat transfer and chemical reaction FEA code for process optimization at home and convected it to work. With the help of a plant db expert the optimizer was hidden under a simple interface for cure press operators. First deployed in '86, it's still in use in plants.
After that I convinced management to acquire some SUN workstations. That's when I started getting Jack's books that are still on my bookshelf and recently used.
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I agree some of the scores seem unlikely and there have been a few comments about the system being too complicated (for those not used to contest scoring) and how theoretically if you work 100 stations but none of them is a QCX then you score 100 X 0 = 0 points!? Its mainly a fun activity to get people on the air so the scoring is secondary and is still sorting itself out.
We are planning to try simplifying it for April's party (Monday 29th April) so it will be 1 point for a non-qcx QSO and 3 points for a qcx QSO, no extra multipliers.? See how that goes.? Is it possible/easy to get N1MM to do that?
73
Peter GM0EUL
? ??
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It certainly appears that some scores are not correct.? If you are using the N1MM+ custom template I provided above, ( Mar 26) you need to leave the last col QCX) blank if the other station was NOT a QCX station.? Unfortunately the software dose not distinguish entries, only blank and non blank entries.??
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I looked at the scores on 3860 and to me it looks that something is not ok with the mulitpliers K0PD 32 QSOs and 32 Multipliers wouldn't that mean he ahd QSO's with 32 QCX users ?
Also some others if the multipliers are the QCX users there must have been? a lot of QCXes on the air.
Next try 29.04. right ?
Martin
DK3UW
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Re: U3S RF Power Transistor
I made an RD06HHF external amp, for my QRP Labs rigs and for general use.
I have one of my QRP Labs rigs set for about 200mw output, and pass it via a 3db attenuator.
I prefer to use an attenuator because it keeps the impedance constant at 50R regardless of frequency (RD06HHF is about 200R).
- Andy -
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Re: U3S RF Power Transistor
Hi Michael,
Thanks for your post on this.
I understand how to replace the standard transistors with the Mitsubishi device. But how did you configure the extra bias pot? Did you simple replace this, or did you place a second pot in series or something like that? How did you avoid over driving the transistor by accident?
Thank you in advance for you advice and comments.
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I recently had a QCX to look at and T1 had already been removed to rewind and wasnt likely to survive another
removal/ replacement sequence ( well the pcb wasnt going to survive)
So although you cab measure the inputs to IC4 against ground this doesnt give any phase information.
A better way would be to measure the differential signal going into IC4, thus giving some confidence that the phasing in T1
was correct.?
My 1980 edition of SSD for the radio amateur had the answer on page 154. A balun would do the job, balanced to unbalanced and?
so the signal could be measured against ground using this sortabalun.
The result in this case was an excellent signal measure across pins 7 and 9 of IC4, some 30 dB below injected signal but obviously at different
impedances. This measure gave enough confidence to go and find the problem elsewhere in the QCX.
Hope this is of some use. I used 8 bifiliar turns 34swg on a BN43-2402 core and isolation via two 470 pf ceramic caps, see photo
cheers
Geoff
GI0GDP
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Second 30m Q using the QCX-17 is in the log.
While the upper hf bands are not particularly stellar, I'm using the QCX-17, largely, on the 30m band.
Just worked Marty, K1FQL in Florida on 10101.7 kHz, while running 4 watts from the QCX-17, with appropriate output filtering, to the downspout antenna.
Sometimes, I choose an operating frequency which hints at the rig I'm using, hence a freq ending in 1.7 such as in this case :0)
So that I may move around the bands quickly & easily, I have the following freqs programmed into the QCX-17's Frequency Presets:
10000.8 kHz WWV & WWVH
10101.7 kHz
14001.7 kHz
15000.8 kHz WWV & WWVH
18069.7 kHz ( also 1.7 kHz inside the lower band edge )
20000.8 kHz WWV only
21001.7 kHz
Notice the 800 Hz offsets in the WWV / WWVH freqs to allow for my CW sidetone/offset freq of 800 Hz.
QCX-series rigs are so versatile !
72 / 73,
Bill, N4QA
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J68HZ
jjpurdum
N3MNT
Bob Benedict, KD8CGH
Peter GM0EUL