HI,
I'm really trying to keep all question here on the group and not in private email.
I was trying to bring linear PA back to life ¨C as I see, the problem is that I have +12V on gates of BS170
in TX after the bias schema and I can`t find a reason of it. Seems that everything in this part is working,
BIAS+ signal is ok (5V),Q205 is switching, Q202 is also switching, for Q201 ¨C I don`t know as it is getting
+0.4V on TX after Q202. Just in case I ??replaced Q202 and Q201 ¨C no effect. +12 V on TX ¨C as I see it
overloads the Q203/Q204 pair and it doesn`t work at all.
So, the questions that could help me:
1.??
Having 12V on the gates tells me you have miswired something, inserted it backward
or plugged a part into the wrong holes.? Also with 12V on the gates if the source
resistors are not burnt out that would be a surprise either that or you have destroyed
the BS170s.? FYI 12V applied to the gates basically turn the mosfets full on (saturated)
and the operating current for that stage should be quite high (greater than 1A) which
would be destructive.
>>>What is the proper bias voltage on Q203/Q204 ¨C as I remember from SoftRock similar schema, it should be about 2.5V, right?
2.?????? Is 0V on RX and +0.4V on TX on base of Q201 correct?
3.????
Those sounds reasonable. Its the same circuit.??
>>>Maybe you do have a bias circuits schema with proper voltages on RX and TX? Or maybe you remember anybody posted it in the group?
No I do not, best I remember its not been asked before.
Allison
|
Hans,
does this mean that if a prototype is shown at Friedrichshafen, the QSX will be released after the fair? ;-)
That would mean release in july.
No worry :-)
Regards,
Stefan
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
Forgot to mention.
CHU 3330 kHz is also roaring in on the QCX-17 tonight.
72 / 73,
Bill, N4QA
|
toggle quoted message
Show quoted text
Sent: Friday, April 12, 2019 3:19 AM
Subject: Re: [QRPLabs] Friedrichshafen 2019
?
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
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
Tonight, I'm running the QCX-17 on EIGHTY METERS !
While transmit power is down near zip point zilch, the attached screen shot shows what I'm seeing ( and hearing, quite loudly ) on 80m FT8 on the stock QCX-17.
72 / 73,
Bill, N4QA
|
toggle quoted message
Show quoted text
On Apr 11, 2019, at 7:47 PM, SkipF, NT1G < skip.flem@...> wrote: Try to address >THEM< directly. I included 'THEM' in this posting, too. On Thu, Apr 11, 2019, 9:35 PM Gary Bernard via Groups.Io <garybernard2= [email protected]> wrote: Kinda off topic but, has anyone had any experience with QRPGUYS? I placed an order, it's paid for but I have heard nothing in over a week.
|
Try to address >THEM< directly. I included 'THEM' in this posting, too.
On Thu, Apr 11, 2019, 9:35 PM Gary Bernard via Groups.Io <garybernard2= [email protected]> wrote: Kinda off topic but, has anyone had any experience with QRPGUYS? I placed an order, it's paid for but I have heard nothing in over a week.
|
Recently discussed at length here:?/g/QRPLabs/message/30865
|
Not to worry, you'll get your order. They only ship once a week and if you order on the same day as the pickup, chances are it will be a week for the order is shipped. That said, they are as reliable as a sunrise.
Jack, W8TEE
On Thursday, April 11, 2019, 9:35:57 PM EDT, Gary Bernard via Groups.Io <garybernard2@...> wrote:
Kinda off topic but, has anyone had any experience with QRPGUYS? I placed an order, it's paid for but I have heard nothing in over a week.
|
Kinda off topic but, has anyone had any experience with QRPGUYS? I placed an order, it's paid for but I have heard nothing in over a week.
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
That's pretty much it, Dave !
I'm keeping a couple of fingers on Q1, Q2, Q3...so far, so good.
Supply voltage = 13.8 VDC
Power output level somewhat different for each band.
FB on Forest
We might try a Q on 60m sometime.
Tnx & 72 / 73,
Bill, N4QA
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
Well, well, well !
Just told my QCX-17 that it's a QCX-60 and, WHAMMO ! It just received its first RBN spot on 5331 kHz from KM3T in New Hampshire, I think it is.
Don't worry, keeping a watchful eye on the spectrum analyzer...
That 60m Cauer filter is doing a great job !
And, just listen to WWV on 5000 kHz and all those AM SWBC stns !
72,
Bill, N4QA
ps
let's see, 15m, 17m, 20m, 30m, 40m, 60m...a six band rig so far !
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
Bill,
You have external filtering, you tell your QCX-17 that it's something else, and you go to the frequency you want. Do I have that right, or is there more to it?
How do you keep from cooking your finals? Did you reduce your power a whole bunch, like by dropping your power supply voltage? I thought I had read that Class E was single-band because of the tuned circuit. And off-band (or for sure, high SWR) drops the finals out of Class E, meaning they need to dump more heat... until they can't. I must have something wrong... did you figure it out, or just do it and get away with it?
BTW, you're not far away... I'm in Forest between L'burg and Bedford.
thanks,
Dave N3AC
On Thu, Apr 11, 2019 at 8:07 PM n4qa < n4qa@...> wrote: OOPS!
There's also stuff in firmware that tells each QCX how to act !
?So, I need to add 3) because?I just discovered that, by fibbing to the QCX-17 by telling it that it's a QCX-40, CHU 7850 kHz is now coming in like gangbusters !
therefore...
3) If all else fails, see if by telling your QCX-XX that it's, instead, a QCX-YY, as it were,? it gives you the wanted results !
Works for me !
72 / 73,
Bill, N4QA
|
Re: A somewhat more complete description of my (ab)use of the QCX-17 and QCX-80 transceivers
OOPS!
There's also stuff in firmware that tells each QCX how to act !
?So, I need to add 3) because?I just discovered that, by fibbing to the QCX-17 by telling it that it's a QCX-40, CHU 7850 kHz is now coming in like gangbusters !
therefore...
3) If all else fails, see if by telling your QCX-XX that it's, instead, a QCX-YY, as it were,? it gives you the wanted results !
Works for me !
72 / 73,
Bill, N4QA
|
Would someone out there having a QCX-40 let us know how well it receives CHU on 7850 kHz ?
The easiest way to give a listen for CHU 7850 kHz on a QCX-40 would be to store 7850 in one of the rig's Frequency Presets, and then transfer that to, say, VFO A.
Don't forget to add your cw offset for USB reception, so store 7850.7 etc, since CHU heavily attenuates its LSB. Also ensure you're set up for CW, as opposed to CW-R.
Hw nw ?
Tnx es 72 / 73,
Bill, N4QA
|
Re: QLG1 - Clarification on what the green LED should do
Hans
Register 03 is set to 0.? It does jump frequency every second when it is zeroing in on the right frequency.
73,
Steve VE3SMA
|
Will the VFO/Signal Generator + 12M LPF be suitable as LO for QO-100 LNB use?
Hello all,
As a U3S WSPR user, I 'am looking for the possibility to use the
VFO/Signal Generator kit + 12M LPF for use as a sinus wave
+/- 25 MHz. generator to act as a LO-signal of a satellite LNB for
use with the Qatar-Oscar-100 (QO-100) AMSAT satellite.
Does anyone has experience using this setup for use as a
affordable 'GPSDO' (using the VFO/Signal Generator + the QLG1
(which I also own already ;-))?
?
73 de Frank PH2M
|
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.
|
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
|
According to the Hamradio website, Hans will be at stand 604 in Hall A1
73, Dave G3VGR
|
Stefan
jjpurdum
Frank PH2M