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Re: Panadapter #qcx
Hi Michael, I've tried it from IC5 pins 1 and 7 and it did seem to be baseband audio at that point. I got at least 0 to 24kHz bandwidth feeding my homebrew panadaptor. It was a little experiment into
By Simon G0FCU · #33382 ·
Re: QSX display #qsx
And with VNC (built into Raspbian) you can operate remote from anywhere! I'm honestly surprised I'm not playing radio from work every day ?
By Michael N6MST · #33381 ·
Re: Panadapter #qcx
Hello, I was thinking that an add-on pan adapter would be a fun project to try. And knowing just enough to know that I know nothing about this, I thought I'd ask what may be a "simple" question. Can I
By Mike K6GTE · #33380 ·
Re: QSX display #qsx
One thing I was looking at was using FLDIGI running on a RPi3 as a ¡°front end¡± for the QSX. Hans says the QSX should interface nicely with JACK (Jack Audio Connection Kit). Coupled with a touch
By Michael Sharp <nexxusix@...> · #33379 ·
QSX display #qsx
Earlier today I was codgertating on "ain't it a shame the QSX is rolling out with an underwhelming display". But then I got to thinking abt my K3 and how rarely I actually touched the FP controls or
By Jack Brabham - KZ5A · #33378 ·
Re: QRP rags to riches #qcx
Garry, My coding wasn't nearly so interesting. I was building one of the first generation "Network Operations Centers" for the Telco? GTE of the SW in the 80's.?? We primarily did remote monitoring
By Jack Brabham - KZ5A · #33377 ·
Re: QRP rags to riches #qcx
Ten statement Fortran plus Fortran IV for the IBM 360, featuring the WATFOR and WATFIV compilers. 1st ed. 1970 - my senior year in high school. Hard to believe I was perusing that book nearly a
By n4qa at_hotmail.com <n4qa@...> · #33376 ·
Re: QRP rags to riches #qcx
Jack / KZ5A, It's more like riding a 'unicycle'!? I'm 'here' to save you from hours of frustration!? I have a box of IBM cards (new) and a FORTRAN coding ruler so you can find coding errors!? :)
By Garry48 · #33375 ·
QRP rags to riches #qcx
i finally got tracking on the replacement uP for my QCX40, looks like it will be here in a week or so.?? That shipment also includes a new QCX 20 to build after I get the QCX40 percolating.? Today
By Jack Brabham - KZ5A · #33374 ·
Re: Grounding shield of GPS cable
Many thanks for some great advice!? I have a dummy load and I need to get in the habit of leaving it connected until I'm really ready to go. -- Jim, KJ7EZN? ? 73!
By Jim - W7EZN · #33373 ·
Re: Qrp-labs and a Huff and Puff circuit board
Allison Agreed, my PLL reference was to the fact that there is a control loop but that it is slower than a conventional PLL. H&P is very useful if done properly, but can be a real nightmare if done
By Arv Evans <arvid.evans@...> · #33372 ·
Re: Qrp-labs and a Huff and Puff circuit board
Mike Several years ago when I was experimenting with H&P designs I found that a Vackar VFO was better for my H&P uses. In addition to being stable, the output is low impedance and seems relatively
By Arv Evans <arvid.evans@...> · #33371 ·
Re: Grounding shield of GPS cable
If you connect one end of a cable shield to ground, you create a Faraday Shield ( Google it ) and having only one end connected to ground prevents spurious current loops creating noise. You must of
By geoff M0ORE · #33370 ·
Re: Qrp-labs and a Huff and Puff circuit board
Mike, I've never measured it, not having ever used it for anything except 75M AM where it was a non-issue.? I usually monitored myself on a SDR and occasionally made minor corrections to stay spot
By Jack Brabham - KZ5A · #33369 ·
Re: Qrp-labs and a Huff and Puff circuit board
Thanks for that Arv. I don't know about moving the yahoo group as, really, how many people are going to use a huffpuff in this age of synths? I liken my interest in this area to a kind of boat-anchor
By Joe Street · #33368 ·
Re: Load impedance for Si5351a?
Thanks, Allison.? I was thinking maybe 100 ohms in series with the blocking cap (to provide short circuit protection) and then 75 ohms to ground at the output of the box to recover a 50 ohm source
By Steve Kavanagh · #33367 ·
Re: Grounding shield of GPS cable
I would connect that shield to the ground only at one end and if the GPS kit already suggests not to use the ground plane of the GPS then you only have the rig end as an option. Both ends will give
By Joe Street · #33366 ·
Re: Grounding shield of GPS cable
Hi Jim, I would personally not hook the shield to to the QCX or the GPS. I have about 3 GPS units running and have never used a shield. If after using the radios and you think? that a shield would
By Bill Oelker · #33365 ·
Re: Qrp-labs and a Huff and Puff circuit board
Hi Jack, I would be interested in how the drift affects the x2 x3 and x4 multiplier for 20-10 meters on the DX-60.? What would you say the HG-10 drifts now?? From cold start and after 30 minutes? I
By Mike Donovan · #33364 ·
Re: Qrp-labs and a Huff and Puff circuit board
Hi Arv, "Consider H&P as a PLL design that locks on multiples of the reference frequency.? It? adjusts slower than a PLL but otherwise many of the PLL design formula can be used." Its not a PLL,
By ajparent1/kb1gmx · #33363 ·