Date   
Squeel and intermittent loss of audio v5

Maurice Bersan
 

Just a heads up if you have a v5 board and are using the universal case with the extra accessory board. The one with Ptt audio and CW jack's mounted on the front panel. I noticed with mine that occasionally when I plugged the mike in I would loose audio and had a loud squeel when I turned the volume down. Problem went away when I removed the mike.. after about an hour of head scratching I found the underside of the accessory board would come in contact with the threaded riser beneath it....the one on the volume pot side of the lower case, which is used to secure the front case stand. Just a minute amount of flexing of the front panel would set it off. I ended up grinding off about 1/32 off the riser for clearance.
Cheers

Maurice.   Vk6hly

Re: Using Vacuum Tube heathkit as Linear Amplifier for QRP

Richard Spohn
 

vu2pep, how did you do this? How did you connect the bitx20 to the
DX-60? I want to try the exact same thing with my uBitx and DX-60B.
Did you plug the output of the Bitx into the crystal socket or VFO
input? This is a new adventure... -- 73, Rich WB2GXM

On 11/15/19, padmanabhan cattamanchi via Groups.Io
<PEPINDIA=yahoo.com@groups.io> wrote:
I have used a healthkit dx60 with the bitx20de 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




Re: Band pass filter

Miguel Angelo Bartie
 

A simple way to kill BC AM signals is using a 1µH or less in pararllel with antenna input....
Try ... 

73 from py2ohh miguel

Re: Prewired 16x2 blue display

ajparent1/kb1gmx
 

Is it that hard to solder in the pins?  Those gold plated ones take solder
very well and its not hard.

Allison

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, N8SBE
 

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