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Re: 2024 Flight of the Bumblebees
One year Dave Yarnes, W7AQK was taking me back to Phoenix to catch a plane home after Ft. Tuthill hamfest. We stopped and operated Bumblebee #72 from Bumblebee, AZ. Fond memories. Doug, KI6DS
By Doug Hendricks · #125990 ·
Re: QMX+ Build Report and Low Power Question on 40m and 30m
On Sun, Jul 14, 2024 at 01:41 PM, M0WAS wrote: > > Hi all, > > Firstly, thanks Hans for a well designed kit, I've been waiting for a > large qmx that I can actually build. I built this over the
By Daniel Walter · #125989 ·
Re: 2024 Flight of the Bumblebees
My QMX and I have a date with a nearby (NJ) POTA or WWFF entity on 28 July: Bumblebee #77! Thanks for organizing, Jody!
By Todd W2TEF · #125988 ·
Re: QMX Low Band - TX problem
G'Day Greg Using the Hardware TX Diagnostic Test - the TX Bargraph is a steady switch on/ switch off (The result is what I expect) Having gotten totally confused - I have gone through this morning
By Rob VK5ZIK · #125987 ·
Re: 2024 Flight of the Bumblebees
*Flight of the Bumblebees is 2 Weeks Away. July 28 th will soon be here.* Bumblebee Number requests are still coming in. As of today, there are 120 Bumblebees signed up to go out and operate portable
By Jody - K3JZD · #125986 ·
QMX Rev 1 works great but RIT tune rate doesn't, Hardware?
My QDX doesn't change tune rate of RIT. After pressing and holding tune encoder, it jumps to the VFO frequency and varies tune rate of VFO, 500, 100 etc. normally. The At the same time, the RIT tune
By Timothy Freeze · #125985 ·
QMX+ power supply option advice
I'll be placing an order for one of these units next week. The intended use will be primarily shack, but I will also be taking it mobile occasional for field days or on camping trips. do not have a
By KI5UMG · #125984 ·
Re: In QMX+ Message play issue #messages
Thanks Jim. I assumed it was an update problem as I installed #20 on Friday. So please report if it disappears! You will really like the new firmware especially if you use presets. 73, George k3GK
By George Korper · #125983 ·
Re: QMX+ Power Supply boards problem #qmx
Thanks David. I hate to try again and just fry another board. I was going to oder some more power supply boards. My jumber for the power at the GPS is very low to the board and doesn't appear to be
By Dan Reynolds · #125982 ·
Re: In QMX+ Message play issue #messages
George - In the QCX+ Message menu both Interval and Repeat are set to zero. Another interesting bit...this issue only impacts Message 2. For other stored Messages (e.g. Message 1, Message 3, Message
By Jim Smallwood · #125981 ·
QMX+ Build Report and Low Power Question on 40m and 30m
Hi all, Firstly, thanks Hans for a well designed kit, I've been waiting for a large qmx that I can actually build. I built this over the weekend, probably about 10-12 hours all in at a relaxed
By M0WAS · #125980 ·
Re: 10w Amplifier #10W_PA
Mine including the proto have been in use and testing while working just fine. Its proven to be very durable despite my abuses. I have not noted any fragility in the QRPL design. Part of the reason
By ajparent1/kb1gmx · #125979 ·
Re: Constant tone on some frequencies on QMX
Hi Adrian, That is great news. It's good to know there's nothing wrong with my build. The birdies (new word to me) don't really bother me, other than a slight worry that maybe there was a defect in
By Willem VA2WLM · #125978 ·
Re: 10w Amplifier #10W_PA
Hi the Bias is a stabilised switch supply, the two IFR FETs will have a different turn on voltage hence two pots. They are on a bit of a knife edge. These are cheap transistors pressed into service
By Andrew Lenton · #125977 ·
Re: Constant tone on some frequencies on QMX
Hello Willem, What you are hearing are internal "birdies" generated by the SMPS. It is a known issue, and it's on Hans list. There was a discussion some time ago, please see this (
By Adrian YO3GFH · #125976 ·
Constant tone on some frequencies on QMX
On my QMX (mid-band), I can hear a constant tone on some frequencies, as if someone is tuning up an antenna, but it just stays. It also doesn't make a difference if I have an antenna attached or not,
By Willem VA2WLM · #125975 ·
Re: WSPR freqs
To add to Bojan's comments a bit. Using a radio like the U3S, which creates the "data" through direct frequency control, you set the frequency to the actual Tx frequency. In Bojan's example 14.097130
By Rob Giuliano · #125974 ·
Re: Hermes Lite 1 : RM Italy BLA 350 : QRP Labs 10W Linear
Thank you for that very practical tip, given how low cost these little relays are, it's probably best to carry out that seperation as you suggest - I;ve never built an RF amplifier before, so all
By G8JCF · #125973 ·
Re: Hermes Lite 1 : RM Italy BLA 350 : QRP Labs 10W Linear
One area is that input and output must not be close as in using the same relay. If isolation is not enough oscillation can be a unwanted result. I make it a point of using separate relays to get
By ajparent1/kb1gmx · #125972 ·
Re: Hermes Lite 1 : RM Italy BLA 350 : QRP Labs 10W Linear
Useful tip, thank you Peter - GM8JCF
By G8JCF · #125971 ·