Re: Spurs/Harmonics fixes for v4 based on v5 board design?
Agreed, spurs on 80m-20m are not a big issue with a stock uBitx. Harmonics on a stock rig are 30dB down or more, so down in power by a factor of 1000. Should be better, but I doubt anybody will ever
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Jerry Gaffke
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#64153
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Re: Spurs/Harmonics fixes for v4 based on v5 board design?
Dave There are more affordable options for the low pass filter mod, much less than the nice qrp labs relay board. Our club is using a board layed out by Gordon G. I would stand by until someone offers
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Curt
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#64152
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Re: Spurs/Harmonics fixes for v4 based on v5 board design?
Yep good ideas.? I'm also considering the daughter card filtering option.? Unfortunately I tried to buy from QRP labs but it didn't like my credit card for some reason.? Luckily they give
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Dave Space
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#64151
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Re: CW operation on microBITX
Geoff fantastic to have you aboard !? for CW - there isn't a specific mode.? for 40m - note rig will say LSB.? then press the key - display should read CW and you should hear sidetone.? if you got
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Curt
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#64150
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Re: Spurs/Harmonics fixes for v4 based on v5 board design?
Dave I suggest keeping this surgery within your comfort zone.? Nothing sacred about surface mount parts, but at 45 MHz keep connections short.? I am not yet considering this particular mod - but you
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Curt
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#64149
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Re: Adding uv meter .board and leads to ubitx
Good idea. Those amps are usually pretty small. Most I have seen are on a board about 2-in square. Bob ¡ª KK5R --------------------------------------------
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Bob Lunsford
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#64148
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Re: For Sale
RE: Has been there for a week. Yep and for someone who really want one, it maybe a good deal but the seller is honest with his full description. For someone determined to get one OR for someone that
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Bob Lunsford
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#64147
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Re: For Sale
RE: Has been there for a week. Yep and for someone who really want one, it maybe a good deal but the seller is honest with his full description. For someone determined to get one OR for someone that
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Bob Lunsford
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#64146
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Re: For Sale
Has ben there for a week. Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 ________________________________ Sent: Sunday, January 20, 2019 1:54:05 PM To: [email protected]
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RICHARD <k6kwq@...>
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#64145
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Re: For Sale
Just got an eBay notice for this... https://www.ebay.com/i/163479080437?ul_noapp=true
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Bob Lunsford
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#64144
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Re: spurs & harmonics, whew!
Thanks Jerry, I am still looking for the best "Low buck" approach since another V4 followed me home and my V4 board is pretty well cut up. I thought the Axicom relay "fix" was not set in stone but if
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Kees T
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#64143
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Spurs/Harmonics fixes for v4 based on v5 board design?
Based on the recent v5 findings/design to replace R26 and add a filter L31, C205, L32
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Dave Space
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#64142
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Re: No detent rotary encoder
Ken VA3ABN, This is a very helpful file - I noticed it is page 22 (!) --- is this part of a larger document? Thank you!
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David Feldman
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#64141
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Re: CW operation on microBITX
Hi Geoff, Not stupid at all. Please refrain from referring to list members as 'stupid' - even it that member is yourself:) I recall that some hams had to play with resistor values to get the CW keying
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Bill Cromwell
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#64140
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Re: Audio problem in my ubitx
Hi Jerry, I had the overwhelming sidetone volume in my V3 and corrected that before I even tried to use it on the air. And I agree about getting it working stock before making mods. When I was still
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Bill Cromwell
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#64139
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Re: CW operation on microBITX
Thanks for the info.....I will get the mic etc fitted tomorrow and see if the rig is ok on SSB??? ...then have a look at the CW again.....evne if I short the contact on kack socket to ground
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Geoff Budden
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#64138
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Re: Audio problem in my ubitx
Yup, good points. I think in a case like this, verifying it is in receive mode (check TX and RX), and getting the receiver to work is the first step. Lots of things could make it decide to go into
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Jerry Gaffke
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#64137
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Re: spurs & harmonics, whew!
Kees, Since you heard about the Axicom relays, you are pretty much caught up. Replacing relays KT1, KT2, KT3 with Axicom relays flat on the board (without any sockets) seems to bring harmonics down
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Jerry Gaffke
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#64136
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Re: Audio problem in my ubitx
Hi Jerry, One of your questions was already answered and you even requoted it. He said there is no audio in the speaker nor in the earphones. It could still be wired wrong. In my V3 with CEC software
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Bill Cromwell
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#64135
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Re: Audio problem in my ubitx
No receiver audio, sounds like it could be a wiring error around either the volume control or the output of the audio amp to the speaker. Triple check that wiring.? What kind of speaker or headphones
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Jerry Gaffke
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#64134
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