Date   
Re: Prewired 16x2 blue display

Ted
 

...or more specifically,

2-Line-X-16-Character-LCD-Display-with-Blue-LED-Backlite

or an upgrade if you like,

4-X-20-LCD-Character-Display-White-on-Blue


As to soldering pins to the board, I might suggest first tinning the pins alone; if you have some soldering flux, a trace amount on the circuit board holes won't hurt though optional. Then, with the board held by a vise or similar, use pliers to hold the pin and place it about 3 or 4mm (1/16"?) into the hole. With a small drop of solder on your iron's tip, heat only the tip of the pin until the solder wicks onto it. Then, immediately draw the pin and the iron outward together to a suitable mounting position for the pin. You can and should roll the hot iron tip around to touch the circuit board, at which time the solder will wick over to the circuit trace. REMOVE HEAT as soon as the wick happens.  Blow on it, cool it, etc and you will be OK from there to continue to the next one.

Hint: Not all pins are used or necessary.



Ted
K3RTA

Re: uBitx Version 4.3 calibration

Vic WA4THR
 

Is this message meant for me? I am not sure what information you are referring to, if so.

=Vic=

Re: Prewired 16x2 blue display

Ted
 

Try www.mpja.com


Re: Using Vacuum Tube heathkit as Linear Amplifier for QRP

padmanabhan cattamanchi
 

I have used a healthkit dx60 with the bitx20
de vu2pep

On Wednesday, November 13, 2019, 07:49:04 PM GMT+5:30, James Lynes <jmlynesjr@...> wrote:


Yes it did. I read it last night. I believe the same info is on the qrp labs website in the qsx area.

James

Prewired 16x2 blue display

M. LeBlanc
 

Looking for sources for prewired 16*2 blue displayed I have ordered a few but they all came with the pins not soldered and I melted the unit trying to install the pins.  Companies who won't charge high shipping fees to Canada are preferred.

Thank you

Re: Band pass filter

Adrian Chadd
 

you'll probably want the BCB filter /and/ a notch filter for that
specific AM transmitter.



-adrian
(about 8mi from a 50KW AM transmitter, and 10mi from another..)

On Thu, 14 Nov 2019 at 16:40, Preston <@Preston2> wrote:

According to Wikipedia KFNN broadcasts from 8145 E Evans Rd in Scottsdale which is 4.5 miles away. Wattage is 22,000.

Re: Band pass filter

Preston
 

According to Wikipedia KFNN broadcasts from 8145 E Evans Rd in Scottsdale which is 4.5 miles away.  Wattage is 22,000.

Re: Band pass filter

Preston
 

I tried tuning 1440 and don't hear much, but 1510 KFNN is really, really loud.  They show their address at 8145 E Evans Rd Scottsdale, 85260 which would be very close if the antenna is at that location.

Re: Nextion 3.5 with CEC 1.097

Denis Dimick
 

Thanks Nikos,
I've been trying to get my LCD to flash for a few days now, it would flash, however, not use the full screen.

Denis
KC6AUP

Re: Nice matching knob for inkits black case #ubitx #tuning-knob #parts

Ismo Väänänen OH2FTG
 

I have a similar one on my M0NKA mcHF and I really like the finger indent in it. Got it with the chinese mcHF case kit for my build.

Re: Band pass filter

Dave New
 

Toroids are self-shielding.

Axials need to be mounted at right angles to minimize coupling between them.  If you have three, you can mount them in the x, y, and z planes.

At this point, most folks just give up and use toroids. Laughing

73,

-- Dave, N8SBE

-------- Original Message --------
Subject: Re: [BITX20] Band pass filter
From: "Jack, W8TEE via Groups.Io" <jjpurdum@...>
Date: Thu, November 14, 2019 11:07 am
To: <BITX20@groups.io>

I'm a software guy, so probably shouldn't answer that. My gut says wound toroids are always better, but the axials worked fine for me. Some EE-type can give a better answer.

Jack, W8TEE

On Thursday, November 14, 2019, 10:39:43 AM EST, Doug W <dougwilner@...> wrote:


On Thu, Nov 14, 2019 at 08:15 AM, Jack, W8TEE wrote:
I built a QRP version for my 49-er that works quite well.
At QRP levels is there an advantage or disadvantage to using wound toriods versus radial inductors (or even SMD), especially on the receive side?
 
--
www.bitxmap.com

--
Jack, W8TEE

Re: Band pass filter

MadRadioModder
 

You might do a little investigating to see if there really is a loud station blocking your receiver before you invest in something you may not need.  The first thing I would try is just receiving off a long wire stuffed into the antenna port (NO TRANSMITTING!).  You’ll get a better understanding if the receiver is the problem that way.

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Preston
Sent: Thursday, November 14, 2019 10:22 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Band pass filter

 

I am about 14 miles away.  I am in a densely populated area with a large apartment group next to our condo community, so I suspect there is probably a huge number of different electronic devices and there could be spurious emissions from them.

Preston

G. Preston Parker

5704 E Aire Libre Ave Unit 1025

Scottsdale, AZ 85254

preston.azcpapro@...

480 499-5427  866 459-5242

480 499-5761 Fax

http://azcpapro.com

Help us improve by taking a short survey http://www.azcpapro.com/client-survey.aspx

 

 

On Thu, Nov 14, 2019 at 7:44 AM Ken Held KF7DUR via Groups.Io <kf7dur=aol.com@groups.io> wrote:

The only AM broadcast transmitter in Scottsdale is located @ 64th st. & Thomas rd.
KAZG 1440AM 5,000 W day, 52 W night
Are you close to that location?


--

…_. _._

Re: Band pass filter

Preston
 

I am about 14 miles away.  I am in a densely populated area with a large apartment group next to our condo community, so I suspect there is probably a huge number of different electronic devices and there could be spurious emissions from them.

Preston

G. Preston Parker

5704 E Aire Libre Ave Unit 1025

Scottsdale, AZ 85254

preston.azcpapro@...

480 499-5427  866 459-5242

480 499-5761 Fax

http://azcpapro.com

Help us improve by taking a short survey http://www.azcpapro.com/client-survey.aspx



On Thu, Nov 14, 2019 at 7:44 AM Ken Held KF7DUR via Groups.Io <kf7dur=aol.com@groups.io> wrote:
The only AM broadcast transmitter in Scottsdale is located @ 64th st. & Thomas rd.
KAZG 1440AM 5,000 W day, 52 W night
Are you close to that location?

Re: Band pass filter

Jack, W8TEE
 

I'm a software guy, so probably shouldn't answer that. My gut says wound toroids are always better, but the axials worked fine for me. Some EE-type can give a better answer.

Jack, W8TEE

On Thursday, November 14, 2019, 10:39:43 AM EST, Doug W <dougwilner@...> wrote:


On Thu, Nov 14, 2019 at 08:15 AM, Jack, W8TEE wrote:
I built a QRP version for my 49-er that works quite well.
At QRP levels is there an advantage or disadvantage to using wound toriods versus radial inductors (or even SMD), especially on the receive side?
 
--
www.bitxmap.com

--
Jack, W8TEE

Re: Band pass filter

iz oos
 

For TX I would only use toroids or air wound coils. For RX you could use radial or SMD. The Q might be better with toroids, although.


Il 14/nov/2019 16:39, "Doug W" <dougwilner@...> ha scritto:
On Thu, Nov 14, 2019 at 08:15 AM, Jack, W8TEE wrote:
I built a QRP version for my 49-er that works quite well.
At QRP levels is there an advantage or disadvantage to using wound toriods versus radial inductors (or even SMD), especially on the receive side?
 
--
www.bitxmap.com

Re: Band pass filter

Doug W
 

On Thu, Nov 14, 2019 at 08:15 AM, Jack, W8TEE wrote:
I built a QRP version for my 49-er that works quite well.
At QRP levels is there an advantage or disadvantage to using wound toriods versus radial inductors (or even SMD), especially on the receive side?
 
--
www.bitxmap.com

Re: Band pass filter

David Forrest
 

Can you tune in the AM station (with either your MFJ1622 or a length of wire) to test the rest of the system?

Re: Band pass filter

Ken Held KF7DUR
 

The only AM broadcast transmitter in Scottsdale is located @ 64th st. & Thomas rd.
KAZG 1440AM 5,000 W day, 52 W night
Are you close to that location?

Re: Band pass filter

Martin Potter
 

Preston wrote :
"I am in a condo ... static ... periodic continuous tones"

It could also be RFI from a local source. If you can power the rig (receiver only) from a battery, put a whip antenna on it (or several feet of wire) and check the level of interference in your condo. Then go up to the roof and check, and out to the parking lot, and finally to the big park down the road. If there is much difference in the noise level between those different places ...
73,
... Martin VE3OAT

Re: Band pass filter

Jack, W8TEE
 

Preston:

There's an article (A Cheap and Easy BCI Filter”, CQ Magazine, August, 2016) that describes such a filter. I built a QRP version for my 49-er that works quite well. It cost be about $0.80 to build the QRP version (perf board works fine, of course):

Inline image

Inline image

Inline image


As you can see, the insertion loss is very small, but it knocks the slats out of any BCI interference.

Jack, W8TEE


On Wednesday, November 13, 2019, 11:29:00 PM EST, Preston <preston.azcpapro@...> wrote:


I am in a condo in Scottsdale, and have tried my new Ubitx on a MFJ 1622 apartment antenna and on a 40 meter half wave center fed dipole.  All I am getting is static on every band with some periodic continuous tones, although it worked in Wisconsin with a dipole.  The ARRL video on Youtube about the Ubitx says at the end, that there is an AM station within a mile that causes problems with the receiver.  They say to buy or build a band pass filter.  I am wondering if this is my problem.  Has anyone run into this?  If so, is there a brand and model that has worked for you?

--
Jack, W8TEE