开云体育

Robert, this would be wrong. There are rectangular pulses with 0 V for low and 5 V for high and duty cycle 50 %. Your DMM should read the mean value of 2.5 V. If realy 3 V IC503 could be wrong. This

Hi Sergey, It all depends on the design of the PA. Normally you won't use SWR protection in your transceiver if a PA is attached and working. Only if the PA is in pass-tru mode it could make sense.

Ludwig, Yes, they’re all ~3.0v

Recently, I sent my Rev 1 QMX, which I had problems with? the right encoder, and not able to load the new firmware. Mr Moore, troubleshoot the radios, and fixed the issues he found, then did a

WAIT.. . You have to get a new cpu from Hans.? It has a special Bootloader in its prom.

Hello Ludwig and Michael, I followed your advice; IC503 is OK. After testing several ICs, I decided to unsolder the CPU, and now I have no shortcuts between VDD and VSS on the board. The CPU was

Ryan, good to know your QMX is back. Yes, that's my plan to put more information for debugging in the Wiki. Some steps are done. It's a question of time and energy to write more. Did you check Q508

Hmm, I haven't tried this yet, the only dummy load I have is a bird termaline 5w, wondering if that's up to the job?

Ludwig, Replacing ic402 and ic403 has corrected the issue.? The receiver is no longer deaf and passed all hardware tests.? Thank you for the help.? The basic trouble shooting you have written

You just cycle through the menu hitting the <Menu> button without hitting the <Edit> button will show you each setting in order. There are 2 possibilities: FRAME TxS => TX windows to show If you

I printed it in black and white only. When in doubt I checked the colour photos on screen, enlarging them if needed. 20 May 2025 Sal 15:17 tarihinde Richard Dyer via groups.io <rdyer39=

Me? Printed and 3-Ring Binder with tabs for assembly/testing and users manuals.

I do not print the whole manual. I do print the parts list for a check off list to verify all the correct components are present before construction. Using that list in conjunction with the components

Yannig, If You have issues reaching the limit for free shipping from Digikey(and mouser), I usually add some Fair-rite ferrites to the order as they tend to find use :-) I recommend this one for

The qrp guys microphone works very well. Sometimes I have to repeat my callsign several times and? e like echo is sometimes like x-ray ..lol. But ist works and I could make some SSB QSOs.

I know….. lots of postings on QMX+ microphones here. Does anybody have a single list of working good/cheap mics? Thanks de K2RMA

I just/finally bought my QMX+ at Dayton FDIM. Is there an estimate for the upcoming r elease of version 1.2 of ABS solution for QMX+? ? ?Where can I find more details, ie pictures and documentation?

Do most folks print their QMX+ assembly manuals or just use/read them online? While I do own a Brother inkjet, does anyone know of a cheap online service to print single copies? My local (good folks)

Yeah, thats fair enough. I keep forgetting to switch of the external preamp, although the battery drain in minimal. I have the QMX+ so i have plenty of room in the case to install the preamp inside. I

Yes, I have version 1.0 and it is working FB on SSB. Mike Krieger [email protected]> wrote: