Date   
Re: ENAMEL REMOVAL

Braden Glett
 

I bet that does work great, but I'm paranoid so I use a really sharply honed knife and scrape all around until I can see copper. Then I tin it with solder just to be certain, before I insert it into the PCB!

Clock Kit 4 Line Display Case?

K2DB Paul Mackanos
 

 Can the clock case kit be easily modified to except the four lime display?
 I foolishly ordered a four-line display thinking it was the same size, but it is quite a bit bigger  ☹️
 
Thanks, Paul K2DB

Re: Shipping: "Buyer Centers Opens Bag" - problem?

jjpurdum
 

When my builders' group built the antenna analyzer, I ordered 30 3.5" TFT displays from China. They arrived in a gray Tyvek bag, with each one wrapped in a small foam sleeve. Five of the displays were cracked, so I complained to the (Chinese) manufacturer. They assured me they were sent in a box and packed so they could not move during transit. This caused me to look at the label on the bag. It had no Chinese markings on it whatsoever. This makes me think that the order was opened for inspection in the US and then the contents just tossed into a bag, a new label printed, and I got the results. I have no proof that this is what happened, but it squares with what I observed.

Jack, W8TEE

On Monday, June 10, 2019, 9:53:13 AM EDT, Axel <axel.friedrich_smail@...> wrote:


I got this now:

2019-06-10 13:12

TÜRKIYE, Turkey, The item was forwarded to the destination country (Otb)

From 2019-06-04 to 2019-06-09 there were no tracking entries.

73 Axel DF1ET

Re: Shipping: "Buyer Centers Opens Bag" - problem?

Axel
 

I got this now:

TÜRKIYE, Turkey, The item was forwarded to the destination country (Otb)

From 2019-06-04 to 2019-06-09 there were no tracking entries.

73 Axel DF1ET

Re: QCX 40M Build ruble's

Sidney Leben
 

Thank all of you who responded about my QCX 40M "Troubles".  It is now being looked at by a fellow QRP,er.. from the group.

With all the suggestions voiced here, I will probably build another soon..

Thanks again to all my fellow Hams !
Sid

Re: Random Wire and no tuner.

Bill Cromwell
 

Hi,

I have been a fan of end fed wires and other antennas used in a multi-band role. That SWR of 1:1 for a 50 ohm load is not just to keep finals happy. I have also noticed that most of the radios don't care about that. What does care about that 50 ohm load is the output filters that are designed for a 50 ohm load. We are depending on those filters to keep our harmonics off the air. You do care about that don't you?

I have a lot of on-air hours with tube finals and pi output networks. My procedure was to tune up the pi-network into a 50 ohm dummy load, Then switch to the matcher (aka tuner) and show the (now) 50 ohm pi network the 50 ohm load it is set to. Whatever happens to the clean signal at the antenna end of the feedline enough of it escapes into the ether to be heard. So don't be too cavalier in dismissing the match between transmitter and feedline.

73,

Bill KU8H

On 6/9/19 5:45 PM, John Kirby wrote:
98% end fed wire antenna since 1957
They work
Easy to hang
Easy to feed
Portable
Height not critical and slopers more directional than horizontal
Add a tuner (for 1:1 SWR) (if that's you thing)(most bands)
Wire lengths to avoid
https://udel.edu/~mm/ham/randomWire/ <https://udel.edu/~mm/ham/randomWire/>
72 73
John
N3AAZ
--
bark less - wag more

Re: QCX 40M Build ruble's

Rickw9rea@...
 

Sid, all of your e-mail did not show.  I may be able to help you if someone else has not already stepped up. Feel free to email me.  I just finished my qcx for 40

rickw9rea@...
--
Rick w9rea

Re: QCX 40 audio problem #qcx

SkipF, NT1G
 

I'd actually go a step further and short the wiper to ground
then test to see if the board is still microphonic.
This is basically what Q7 does during XMIT.
gl de nt1g

On Sun, Jun 9, 2019, 7:41 PM Ham Radio <bernard.murphy@...> wrote:
If you have not already done so, carefully check for proper continuity between the audio pot and the corresponding pads on the board.

If no joy, try some contact cleaner/lubricant  on the pot.  Do not use regular  DeOxit on the audio pot.
--
73, Bernie, VE3FWF

Re: QCX 40 audio problem #qcx

Ham Radio
 

If you have not already done so, carefully check for proper continuity between the audio pot and the corresponding pads on the board.

If no joy, try some contact cleaner/lubricant  on the pot.  Do not use regular  DeOxit on the audio pot.
--
73, Bernie, VE3FWF

Re: Random Wire and no tuner.

John Kirby
 


98% end fed wire antenna since 1957

They work
Easy to hang
Easy to feed
Portable
Height not critical and slopers more directional than horizontal
Add a tuner (for 1:1 SWR) (if that's you thing)(most bands) 

Wire lengths to avoid
https://udel.edu/~mm/ham/randomWire/

72 73
John
N3AAZ

Re: ENAMEL REMOVAL

Kent Trimble, K9ZTV <k9ztv@...>
 

Hi Roger,

Mine is a Hakko 808.

73,

Kent  K9ZTV

On Jun 9, 2019, at 9:19 AM, rwklein@... wrote:

Kent, 

Thanks for the tip!  I'm curious what desoldering gun you use.  I see a number of cheap ones on Amazon, but not sure if they will do the job.

73,

Roger N5RWK

Re: Random Wire and no tuner.

Dan Baker
 

Thank guys. Those are my thoughts as well. I have plenty of wire and room so I thought why not?  I can let it band hop this way and forget about resonance since 200 mW seems to cover a multitude of sin.  

Dan 

Re: Random Wire and no tuner.

Alan de G1FXB
 

Not 60ft, I run mine into a random length around 15ft at 9Ft AGL

Have to admit, I run it through a 3dB attenuator to mitigate the unknown mismatch, the downside I loose half my RF.
Has run that way since 2013, single BS170 at 5V and works fine, don't sweat it.


Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
??2019-06-08 09:06?? ??G1FXB?? ??7.040103?? ??-8?? ??0?? ??IO91?? ??0.1?? ??VK4ICE?? ??QG62nr?? ??16563?? ??49??
??2019-06-04 12:10?? ??G1FXB?? ??14.097106?? ??-11?? ??0?? ??IO91?? ??0.1?? ??FY5KE?? ??GJ35?? ??6988?? ??242??
??2019-06-09 13:48?? ??G1FXB?? ??28.126094?? ??-23?? ???????? 0?? ??IO91?? ??0.1?? ??SQ5ALQ?? ??KO02hi?? ??1484?? ?????????? 78??
??2019-06-08 22:48?? ??G1FXB?? ??28.126159?? ??-23?? ??0?? ??IO91?? ??0.1?? ??IZ0FKE?? ??JN61fw?? ??1474?? ??131??
??2019-06-06 09:18?? ??G1FXB?? ??28.126106?? ??-17?? ???????? 0?? ??IO91?? ??0.1?? ??EA1GAR?? ??IN52pb?? ??1197?? ?????? 212??
??2019-06-09 09:18?? ??G1FXB?? ??28.126112?? ??-10?? ???? ?? 0?? ??IO91?? ??0.1?? ??LA3FY/2?? ?????? JP40fj?? ??1152?? ?? ?? ?? 27??

On 09/06/2019 17:49, Dan Baker wrote:
??So what I???m considering doing is letting the ultimate 3S band hop into say a 60 foot random wire antenna. I guess the worst that can happen is I have to replace the BS170. Has anyone tried this?

Thanks, ??Dan KM6CQ??

Re: Random Wire and no tuner.

SkipF, NT1G
 

The 'army' had a long wire fed by a 50 ohm resistor, mainly to protect
the final tube.

On Sun, Jun 9, 2019, 12:49 PM Dan Baker <km6cq@...> wrote:
 So what I’m considering doing is letting the ultimate 3S band hop into say a 60 foot random wire antenna. I guess the worst that can happen is I have to replace the BS170. Has anyone tried this?

Thanks,  Dan KM6CQ 

Re: Random Wire and no tuner.

James Anderson
 

Hi Dan. 

I used to use a short approximately 5 metre piece of wire with no ground other than the PSU ground, if that made any difference. 

Literally hanging out of the bedroom window on 40m. 

Only TX with very low power, single transistor with no detrimental effect on the poor U3S. 

This is my spare U3S out of three so if the final went pop, it wasn’t the end of the world. 

I’ve plenty spare HiHi. 

I did get spots. Nothing earth shattering but it was still very surprising what can be achieved. 
Just do it and see where you can get too. 

Kindest, James. 



On 9 Jun 2019, at 17:49, Dan Baker <km6cq@...> wrote:

 So what I’m considering doing is letting the ultimate 3S band hop into say a 60 foot random wire antenna. I guess the worst that can happen is I have to replace the BS170. Has anyone tried this?

Thanks,  Dan KM6CQ 

Re: Random Wire and no tuner.

 

After 45+ years of doing beams, resonant antenna, and careful attention to detail, I simply stopped worry.

I have spent many afternoons in the local woods/ gravel pit clearing, taking a random length from the corner pile of my garage, another random length for a ground wire, and that's it. I have yet to have an afternoon without sunshine, conversation and many happy CW contacts.  I do the same with my WSPR and QCX contacts on 40M.

I generally run 3 watts or less and have never had to replace a BS170 yet. But I seem to enjoy the afternoon ham time more than ever !  This is about having enjoyable fun, isn't it !

Frank  W1FRA

Random Wire and no tuner.

Dan Baker
 

 So what I’m considering doing is letting the ultimate 3S band hop into say a 60 foot random wire antenna. I guess the worst that can happen is I have to replace the BS170. Has anyone tried this?

Thanks,  Dan KM6CQ 

Re: U2/U3 DDS modules, frequency vs input voltage ?

 

On Sat, Jun 8, 2019 at 08:09 PM, Alan de G1FXB wrote:
There was also some changes in firmware if yours are not the latest that U2 / U3 can run.
RE module setup:-

http://qrp-labs.com/ultimate3/u3mods.html#multiturn

a better was to remove it totally as hinted at
Well today I did the mod and removed the 1K resistor.

Forgot to initially replace it with the link, and so upon power up of the U2 all I got was gibberish on the LCD.

I thought I had zapped the 328P, but then after some messing about I realised I had made a mistake.

I can't say that I noticed much difference in the the tuning of the blue pot.

Hard to tell really.

Just waiting for the U2 to calibrate itself, fingers crossed I'll be back on frequency soon, and maybe I might notice
something.

73 de Andy

Re: ENAMEL REMOVAL

Roger N5RWK
 

Kent, 

Thanks for the tip!  I'm curious what desoldering gun you use.  I see a number of cheap ones on Amazon, but not sure if they will do the job.

73,

Roger N5RWK

Re: U2/U3 DDS modules, frequency vs input voltage ?

 

> Simple the DDS does not drift.  Now stop laughing!

See post #1, where I said..

>(Actually, I suppose it's really appllied to the 125Mhz ref osc, not the DDS itself, just to keep you pedants happy).

;-)

73 de Andy