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Re: New QCX 40 DOA
fred.g3srf@...
Any possibilty of a photo that is in focus??
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Re: New QCX 40 DOA
Jack Brabham - KZ5A
I'd love for the problem to turn out to be solder related but I don't think so.
Anyway.... in the meanwhile I just ordered a new chip. i suppose it is coming from Turkey and will take a couple of weeks to get here. I'm not screwing with it anymore, if the new CPU doesn't bring it around it's off to the junk box for the QCX and I'll have a new case for sale. 73 Jack KZ5A
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Re: Kit ordered
Hans Summers
Hi Dennis As I mentioned, we are waiting for Dummy Load kits so yours will be delayed, as stated on the ordering page in the shop. It's an abnormal delay. We don't usually run out of things these days. 73 Hans G0UPL
On Mon, Mar 18, 2019, 21:26 dkwflight <dkwflight@...> wrote: Hi
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Re: Kit ordered
Jack Brabham - KZ5A
My QCX was ordered 2/28 and arrived
3/15. Case ordered 3/13.
73 Jack KZ5A
On 3/18/2019 12:26 PM, dkwflight wrote:
Hi
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Re: QLG1 - Clarification on what the green LED should do
Steve Kavanagh
Ok. I have made a small step forward. In lieu of an oscilloscope I made a simple circuit with an LM111 comparator and an LED. It is set up so the LED will turn on whenever the input voltage is below a reference voltage, which is set with a pot.
When the input is connected to IC1 pin 1 (1PPS output from GPS module) the test circuit LED flashes briefly once per second for a reference voltage as low as 0.5 V. Above about 3 V reference the LED stays on. So it seems Pin 1 really is sitting at about 3 V 90 percent of the time and about 0 V 10 percent of the time. I wonder if the GPS module is designed somehow to produce an upward 1PPS pulse into a pull-down load or a downward pulse into a pull-up load. I guess the next step is to break the connection at the GPS module output and see if it does the same thing when isolated from the 74ACT08. 73, Steve VE3SMA
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Re: Kit ordered
dkwflight
Hi
I ordered the QCX kit with dummy load Payment by paypal mar 17 The German case the same day I will post here on arrival. Thanks Dennis AG4TD
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Re: New QCX 40 DOA
n4qa at_hotmail.com
No, I'm wrong !
IC2, pin 20 is supposed to connect to one side of L5 anyway! 72 / 73, Bill, N4QA
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Re: New QCX 40 DOA
n4qa at_hotmail.com
My vote goes to a bridge between IC2, pin 20 and L5
72 / 73, Bill, N4QA
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Re: New QCX 40 DOA
Jack Brabham - KZ5A
Those 3 pins together look bridged from this view due to the component leads being bent toward IC2 before soldering. I'm trying to get some better resolution pics from better angles.
73 Jack KZ5A
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Re: New QCX 40 DOA
n4qa at_hotmail.com
I think I see the solder bridge !
Not sure of the pin number, but looking at the bottom row of joints for the 28-pin device, the fifth joint from the right end appears to be bridged to the connection directly below it. Good luck! 72 / 73, Bill, N4QA
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Re: New QCX 40 DOA
Walter Keen
Sorry, Can't zoom in very well, but on the 28 pin socket connections, on the bottom side it looks like there may be 3 connections that might be bridged to an adjacent connection just below it. Not having assembled a QCX (yet), I'm not sure if they are connected on the circuit board anyway.
On Mon, Mar 18, 2019 at 10:09 AM Jack Brabham - KZ5A <kz5a@...> wrote:
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Re: QLG1 - Clarification on what the green LED should do
John Canfield <bucket@...>
I built two QLG1s, the first one has a blinking green LED when a fix is acquired, the second one will not blink the green LED with a fix. I know #2 QLG is working fine because it's hooked up to a U3S. Maybe one of these days I'll troubleshoot the problem.
-- John, WB5THT
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Re: New QCX 40 DOA
Jack Brabham - KZ5A
Solder side picture attached.
Reward!!!!! 50 Brownie Points to
whoever finds the solder bridge!!!!
73 Jack KZ5A
On 3/18/2019 10:47 AM, Jack Brabham -
KZ5A wrote:
Opps, and the display isn't dead, it is doing the single bar of blocks bit.
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Re: CW Ops magazine
I've just finished CW Academy Level I and have just started Level II. Level I was pretty intense with meetings twice a week and the expectation of practicing (mostly listening head-cops) for 30 minutes / day. Level II expects you will practice 45min to 1 hour per day. You should come out the other side being able to send / receive at 20wpm or better.
Their tools and lessons are all on line and you can grab them and use them if you wish, but nothing beats being tutored and encouraged by a group and your instructor. It is free to join and only requires lots of time and practice. Rgds, Ken KN4DGR
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Re: New QCX 40 DOA
Jack Brabham - KZ5A
Opps, and the display isn't dead, it is doing the single bar of blocks bit.
Jack
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Re: New QCX 40 DOA
Jack Brabham - KZ5A
Steve,
Pin1 reads 0.000 V on my DVM and appears open (>60M) to both ground and the +5 rail with the chip installed and powered up. I also did resistance checks to ground on all the IC2 socket pins with the chip removed and found nothing inconsistent with the schematic. 73 Jack KZ5A
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Re: New QCX 40 DOA
Steven Weber
Pin 1 has an internal pull up resistor. Something is pulling it low. Or its shorted to ground. Pin 1 is routed over to the ISP header and a pad next to the volume control. There could be short between the track and ground plane which didn’t etch all the way through. Lift the pin out of the socket and see if the display comes to life.
Steve KD1JV
Pin 1 on the CPU is 0V, does it have a pullup somewhere?. pin 7 and 20 are ~4.85V
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Re: Kit ordered
Hans Summers
Hi all No, it is nowhere NEAR to 6-8 weeks! I keep detailed statistics on shipping times, when people take the trouble to email me that their package arrived. The average shipment time from Turkey to US is 19 days. The shortest recorded was 6 days and the longest recorded was 54 days. There is quite a lot of variation. This is just the shipping time, from our post office to your door. The other component is the delay between order date and shipment date. At certain times we really did have delays of up to 8 weeks, this was during November/December 2017 when the shipment ladies in Japan could not keep up with the order volume of QCX kits and it had not all been brought under control yet. But those days are past. Since May 2018 we have shipment from Turkey and have a very high capacity. We always ship orders out within 1 business day, as long as everything for the order is in stock. Where something is not in stock I try to make that clear on the shop page. As you will see right now, http://shop.qrp-labs.com/qcx , when ordering a QCX, there is a message that the dummy load is out of stock and your order will wait for the dummy load PCBs to get here. Currently they are on the way, we expect them to arrive here in about 1 week once they have got here, cleared customs, and got through the domestic courier to my QTH. All orders are already labeled and packed and all available items wrapped and put in the box; so as soon as the dummy load PCBs get here, everything will all be shipped out very quickly. I try to avoid anything being out of stock but it is sometimes a bit of a balancing act, and sometimes there are delays due to various things, some expected (public holidays) and some unexpected. So, sometimes we do run out of something for a couple of weeks but this is not the norm, and is nothing like the old days 8 week peak of the QCX shipment delay, which was for an entirely different reason (inadequate shipping capacity). 73 Hans G0UPL
On Mon, Mar 18, 2019 at 6:37 PM Al Lipinski <lipinski.al@...> wrote:
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Re: Kit ordered
ANDREW STEEN
Hi Dennis. Congrats. The little dummy load is handy, but follow the instructions for assembly very carefully. I just ordered my second QCX case from Germany (for my 40M) and I got the impression that it would not be any more than a couple of week at most. Enjoy! Andrew K6STN
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of dkwflight
Sent: Monday, March 18, 2019 7:28 AM To: QRPLabs@groups.io Subject: [QRPLabs] Kit ordered
Hi
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Re: CW Ops magazine
n4qa at_hotmail.com
Then there's:
"Bens best bent wire..." 72 / 73, Bill, N4QA
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