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Re: Power rating for LPF Kit?
#lpf
Thank you! Out of curiosity, What are the factors that dictate this? How could I possibly increase the power they can handle?
Thank you! Out of curiosity, What are the factors that dictate this? How could I possibly increase the power they can handle?
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By
craftxbox
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#51617
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Re: One more problem U3S WSPR
Doug, it sounds like a PSU supply dipping problem to me. Try a large value electrolytic across your 5v line.
73 Ken G4APB
Doug, it sounds like a PSU supply dipping problem to me. Try a large value electrolytic across your 5v line.
73 Ken G4APB
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By
KEN G4APB
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#51616
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Re: Power rating for LPF Kit?
#lpf
The Low Pass Filter kit can handle at least 10W safely.
73 Hans G0UPL
http://qrp-labs.com
The Low Pass Filter kit can handle at least 10W safely.
73 Hans G0UPL
http://qrp-labs.com
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By
Hans Summers
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#51615
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Re: Using 5Watt PA on 6 and 2meters.
#5wPA
Phil for the RD15HVf1 you will have to "twist the pins" on G and S it is I believe . People who have made PCB drafting errors of this type have reported losses at HF NOT VHF of 0.3 dB from this.
Phil for the RD15HVf1 you will have to "twist the pins" on G and S it is I believe . People who have made PCB drafting errors of this type have reported losses at HF NOT VHF of 0.3 dB from this.
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By
Timothy Fidler
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#51614
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Power rating for LPF Kit?
#lpf
Hello, I'm wondering what the maximum power the LPF Kit's can take, Specifically for the 80m, 40m and 20m variants if they differ any.
Hello, I'm wondering what the maximum power the LPF Kit's can take, Specifically for the 80m, 40m and 20m variants if they differ any.
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By
craftxbox
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#51613
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Re: Newly built QCX+ processor works intermittently
#qcx
Rahul, pins 1,5 and 16 are tied to ground. 1 and 16 are 0 volts. Pin 5 should be too. Looks like a bad solder connection.
Jim...kq3s
Rahul, pins 1,5 and 16 are tied to ground. 1 and 16 are 0 volts. Pin 5 should be too. Looks like a bad solder connection.
Jim...kq3s
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By
Jim Painter
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#51612
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Re: 0.03w RF output, 1w at transistor drains, Help?
#qcx
There was an extra 104 capacitor included with my kit, Should i replace c29 with that?
There was an extra 104 capacitor included with my kit, Should i replace c29 with that?
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By
craftxbox
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#51611
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Re: 0.03w RF output, 1w at transistor drains, Help?
#qcx
I'm measuring '5.2w' on the input of c29, and only 0.14w on the other side, I'm assuming this is not correct here
I'm measuring '5.2w' on the input of c29, and only 0.14w on the other side, I'm assuming this is not correct here
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By
craftxbox
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#51610
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Re: Using 5Watt PA on 6 and 2meters.
#5wPA
IRF510 will work at 6m, but not at 2m.
For 2M you need the RD15VHF1.
Allison
-------------------------------
Please reply on list so we can share.
No private email, it goes to a bit bucket due address
IRF510 will work at 6m, but not at 2m.
For 2M you need the RD15VHF1.
Allison
-------------------------------
Please reply on list so we can share.
No private email, it goes to a bit bucket due address
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By
ajparent1/kb1gmx
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#51609
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Re: Using 5Watt PA on 6 and 2meters.
#5wPA
Phil
do a search here naming that device - see what is reported here - it makes sense that device may do VHF better. also try search the web with U3S and that device name as well. of course someone
Phil
do a search here naming that device - see what is reported here - it makes sense that device may do VHF better. also try search the web with U3S and that device name as well. of course someone
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By
Curt wb8yyy
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#51608
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Re: One more problem U3S WSPR
Vern
Here is a picture of the board
Vern
Here is a picture of the board
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By
Doug Hengst
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#51607
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Re: One more problem U3S WSPR
No..leave them in...what wires are you talking about..your coax wires...
Sent from my Samsung Galaxy smartphone.
No..leave them in...what wires are you talking about..your coax wires...
Sent from my Samsung Galaxy smartphone.
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By
Vernon Matheson
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#51606
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Re: One more problem U3S WSPR
Vern
I can do that. Do you want me to remove the LPF's??? I would rather not, but I can. The reason is that I made a mistake
when I wired this board. I soldered the stranded wire directly to the
Vern
I can do that. Do you want me to remove the LPF's??? I would rather not, but I can. The reason is that I made a mistake
when I wired this board. I soldered the stranded wire directly to the
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By
Doug Hengst
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#51605
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Re: One more problem U3S WSPR
I do.... I checked and re-checked....
Thanks for the suggestion
Doug WA3ZHG
I do.... I checked and re-checked....
Thanks for the suggestion
Doug WA3ZHG
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By
Doug Hengst
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#51604
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Re: One more problem U3S WSPR
Probably a long shot. Do you have the LPF oriented correctly (IN/OUT)
Probably a long shot. Do you have the LPF oriented correctly (IN/OUT)
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By
N3MNT
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#51603
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Re: Newly built QCX+ processor works intermittently
#qcx
Rahul,
Pin 3, your contrast adjustment looks very off from expected. I would start there. Check R47 which Is setting the contrast voltage to pin 3. You should not see 5 volts unless your R47 is
Rahul,
Pin 3, your contrast adjustment looks very off from expected. I would start there. Check R47 which Is setting the contrast voltage to pin 3. You should not see 5 volts unless your R47 is
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By
Gregg Myers
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#51602
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Re: One more problem U3S WSPR
Doug can you take a close up pix of the top of the relay board and post.
Vern
On 2020-08-18 22:15, Doug wrote:
Doug can you take a close up pix of the top of the relay board and post.
Vern
On 2020-08-18 22:15, Doug wrote:
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By
Vernon Matheson
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#51601
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Re: One more problem U3S WSPR
Vernon
I have LPF's in slots 1-4 and have them assigned as such in the configuration with only slot 3 activated. That is for 40 meters and it works fine.
If I deactivate slot 3 and activate any of the
Vernon
I have LPF's in slots 1-4 and have them assigned as such in the configuration with only slot 3 activated. That is for 40 meters and it works fine.
If I deactivate slot 3 and activate any of the
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By
Doug Hengst
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#51600
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Re: Newly built QCX+ processor works intermittently
#qcx
When the LCD displayys a single row of blocks , I took a reading and this is what I get when compared to the manual. This is running off a 12 V PSU
When the LCD displayys a single row of blocks , I took a reading and this is what I get when compared to the manual. This is running off a 12 V PSU
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By
rahul@...
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#51599
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Re: One more problem U3S WSPR
Doug I presume you have your menus done correct assigning each band to band position on the LPF and activating each band. 0 is on the main board and 1 to 5 on the lpf board.
Sent from my Samsung
Doug I presume you have your menus done correct assigning each band to band position on the LPF and activating each band. 0 is on the main board and 1 to 5 on the lpf board.
Sent from my Samsung
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By
Vernon Matheson
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#51598
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