Re: QMX+ printed assembly manuals
Printing is sometimes useful for highlighting sections. ? Also for Writing notes, menu settings and measured voltages on a schematic for future reference On the other hand using a display lets you
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Bruce Akhurst
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#145858
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Re: QMX+: low RX sensitifity @ 6m / 22 dB noise floor / 1500 Hz wistle
Hello Ken Have same issue. Could detect LO signal (RX -12kHz,-40dBm) and additional sidebands at 6 m and 10 m at BNC (RX).see also my Posts. Another OM also detected these Signals. Resoldering
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Michael
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#145857
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Re: QMX SSB low output
Stan, many thanks for that, I will try your suggestions. Before you replied I tried an interesting experiment, in case the problem was with my microphone... I set up my QMX+ for WSPR transmissions the
By
KEN G4APB
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#145856
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Re: T507 Winding Direction/Handedness
#building
#QMXplus
#transformer
Yes, all terminals of T507 are at DC ground.? The inductors allow the RF signal to pass, and generate the FWD and RVS signal detection for power and SWR calculations.
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Stan Dye
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#145855
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Re: T507 Winding Direction/Handedness
#building
#QMXplus
#transformer
I redid my windings as you suggested and they came out better.? Not perfect but better. After soldering in place, when I checked the connections with a DC meter on ohms everything seemed to be very
By
@HEC_VA3HEC
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#145854
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Re: Digikey order
Good idea to have spare 74ACT08's if you plan to blow the BS170's. When the BS170's fuse up internally I'd guess the 74ACT08 gate drivers might see 12v, at least for a moment. Look on Mouser or
By
Jerry Gaffke
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#145853
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Re: New QMX - observations and best QSO
New to the group - wanted to say Hi and since this thread is about observations and best QSO - I wanted to share my recent experience with the QMX+.? I am very fortunate to have an awesome? brother
By
K0CAO - Chris
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#145852
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Re: QLG2 for Icom 9700
#gps
#icom
#qlg2
Hi Mark, How did things go with your setup? I¡¯m in exactly the same situation! I¡¯ve run all the tests, and from what I understand, the MAX3221IPWR chip used in the IC-9700 should be able to
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Ricardo Oitav¨¦n
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#145851
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Re: Digikey order
I threw a few condenser mic elements into my last order, the one Hans recommends for the QMX. My whole order had a 10% tariff fee added on, which didn't thrill me.
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Lawrence KC6WOG
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#145850
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Re: Digikey order
The IC503 likes to fail along with the BS170's. No part numbers unfortunately. Schematic shows IC 503 is a 74ACT08D but chip is marked TI32A35SM ACT08 which I cannot find a spec sheet on.
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codeleaf@...
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#145849
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Digikey order
I need to order some parts from Digikey. I though it would be good to order some backup parts for the QMX+. Besides BS170's what are the components that fail most frequently? Also if you have specific
By
Eugene Pressley
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#145848
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Re: Pop! Oops, blew a BS170 in my QMX, my fault. Lesson learned
I say do them all, they're super cheap. Make sure you get them from Mouser or Digikey. There are a ton of fake bs170 out there.
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codeleaf@...
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#145847
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Why no AGC for digital modes, as other modes?
To Da Wiz; thank you, and a request, to make it better. Personally, I would appreciate the choice to use AGC, with my QMX+, or not, for all modes. I have used fast or slow AGC with my FT-990 and
By
Fred Murray
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#145846
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Pop! Oops, blew a BS170 in my QMX, my fault. Lesson learned
Hi all, I learned from the operating manual that the SWR measurement is from the center of the band. I had forgotten this trying to squeeze a POTA activation while on a business trip this week. My SWR
By
KF0OUH
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#145845
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Re: QMX died before i got a chance to transmit.
yep sorry the talet cell operates as you specified. the one i have can either charge with a 12.6v charger, or a usbc cable.? i have a couple other regulated batteries that i can choose 12v out.? and
By
Teddy
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#145844
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New QMX - observations and best QSO
My QMX arrived last week. Since I operate primarily digital, ( but seriously working on honing my CW skills) I was able to get several 'DIGI' mode programs to work. Not so easy with the SSB-required
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Jake Groenhof
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#145843
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Re: Introducing QMX CARROT
Here's the complete thread: /g/QRPLabs/topic/112783679 ( /g/QRPLabs/topic/112783679#msg145840 ) You can see all recent messages to the forum with a web browser here:
By
Jerry Gaffke
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#145842
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Re: QMX SSB low output
Randy, you would find some of this information when reading Hans papers. And did you check the Wiki? I think there is such a document already, but not complete now. 73 Ludwig
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@Ludwig_DH8WN
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#145841
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Re: Introducing QMX CARROT
I guess that I missed the start of this thread¡¡ where is the carrot info? John KK4ITX ?Each mistake is a learning opportunity.?
By
KK4ITX John
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#145840
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Re: QMX SSB low output
Stan, your two posts here and Jerry Gaffke's would make an excellent QMX* SSB Setup and Troubleshooting Wiki entry for the group! Might save you having to restate it at some point. :-) -- Randy, N4OPI
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Randy Paulson
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#145839
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