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Messages - caulktel

Pages: [1] 2 3 ... 10
1
Morse Code / Re: Can Morse Code Still Save You?
« on: August 28, 2018, 03:07:19 PM »
Great article Gil, sure sparked a lot of opinions but that's great if it gets people thinking.

Joel
N6ALT

2
Stan,

Sorry, I meant to direct you to http://ubitx.net/ for more info regarding the uBitx problem. Farhan's rebuttal is there. Personally I don't think this is as big a problem as some individuals are trying to make us believe. I still use mine everyday.

Joel
N6ALT

3
Hi Stan,

I am aware about insulating the IRF510's from ground, I have done this on all 5 of my Bitx builds.

 As far as the harmonic/spur problems of the uBitx are concerned, its far too complicated for me to explain, and due to the fact that no two people can agree to anything on that group, it muddys  the water even further. Suffice it to say, something needs to be done and I'm waiting to see what Farhan comes up with, he always seem to find a simple solution to problems as opposed to these people that want to start from scratch and completely redesign the radio.

Joel
N6ALT

4
Oh yeah, a lot of guys doing FT8 and other modes. I'm just not in to digital modes so I haven't paid much attention to it.

Joel
N6ALT

5
Don't know if any of you have been following the debacle going on over at the bitx20.io group regarding the uBitx, but those few fortunate people who have quality Spectrum Analyzers and know how to use them, have found that the uBitx 'mostly' does not pass FCC specs, (US), for spectral purity, (some nasty spurs). Some are advising not to use them on the air until some kind of fix is figured out. Funny I have been using mine every since they came out and nobody has knocked at my door yet, but I don't want them to either. All of the EE's on the group are seeking to redesign the uBitx to meet specs. I find this whole thing to be rather disheartening after all the time and effort I put into my two radios. They are talking about cutting the traces going to the LPF section and adding a daughter board with a new LPF design to fixed the existing boards. Not quite sure what to do but wait and see what everybody comes up with. :( :-[ :-\

Joel
N6ALT

6
Antennas / Re: The 49:1 Half-Wave End-Fed Transformer Campain is ON!
« on: August 04, 2018, 05:18:21 PM »
Gil,

I agree, most of these groups have a select few people that like to hear themselves talk and are self professed experts. I have been using EFHW wires with 64:1 and 49:1 transformers with great results for 30 plus years. I continue to use them and will keep using them. As far as I'm concerned, I can't tell any difference between using a 49:1 vs a 64:1 transformer either, they both seem to work equally, just slightly different wire lengths. We use what works, including my Mag Loop which people say is a waste of time but mine works great.

Joel
N6ALT

7
Antennas / Re: Successful Wire Antennas.
« on: August 03, 2018, 10:19:38 AM »
Strange, there are 237 pages in that PDF but when I download it I can only look at 145 of them. I really wanted to the section on EFHW's.

Joel
N6ALT

8
Antennas / Re: The 49:1 Half-Wave End-Fed Transformer Campain is ON!
« on: July 28, 2018, 12:43:44 PM »
Gil,

I don't know if you will be able to read this thread or not, but it's all about EFHW and 49:1 transformers and the like. Some of the people were shouting at each other, but still some good information. https://groups.io/g/BITX20/topic/end_fed_antennas_w_ubitx/23807137?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,23807137

Joel
N6ALT

9
Antennas / Re: The 49:1 Half-Wave End-Fed Transformer Campain is ON!
« on: July 27, 2018, 11:15:44 AM »
Gil,

I like the idea of your campaign. I have a question though, for years I have been building EFHW auto transformers using this method, http://www.zendamateur.com/download/file.php?id=4051 which is a 60:1 transformer. Yours is a 49:1, whats the difference? Mine seem to work very well, would there be a advantage to using a 49:1 over the 60:1? Just curious.

Joel
N6ALT

10
I ordered another uBitx, it should be here in a few days. It will be the V4 board with some improvements incorporated into the new PCB. I will be using a 3.2 inch Nextion touch screen display on this one.
I'm going to make numerous case improvements to this one, like bolting the finals to the case for better heat dispersion. Gil, you wont like this one because it's going to have a higher idle current draw than the previous one, but it isn't intended for portable use.
I look forward to starting work on it. Ill post my progress.

Joel
N6ALT

11
Morse Code / Re: Yaesu CW Filters
« on: July 11, 2018, 01:19:26 PM »
I feel like have to defend the FT-817 :D I love my FT-817ND but I only use it for SSB and I'm very happy with the performance. I do have the Inrad SSB filter installed. YMMV.

Joel
N6ALT

12
General Discussion / Re: Have you tried the 160m band?
« on: July 04, 2018, 12:43:39 PM »
I always marvel at Peter Parker, VK3YE's videos running 160 meters AM/SSB QRP with a kite antenna and dipoles. https://youtu.be/ACiQlOThXR0 There always seems to be someone on the air in Australia and he always works from the beach with the wind blowing. It is a intriguing band alright. I wish I could try it out somehow, but kind of hard from a mobile home park.

Joel
N6ALT

13
General Discussion / Re: Have you tried the 160m band?
« on: June 28, 2018, 06:39:56 PM »
A QCX for 160 meters :) Could you imagine how many turns you would need to put on T1?

Joel
N6ALT

14
Looks great Andy, I love that gray finish. I wonder if a blue display might not look really sharp with the gray case. I just received my AGC and Click/pop kits today so I'm going to start in on building them and modifying my uBitx board Monday morning. I could put up with the pop every time I let go of the PTT, but this radio really needs AGC, so looking forward to finishing it. Keep us posted on your results.

Joel
N6ALT

15
Morse Code / Re: The One-Watt Magic Number.
« on: June 15, 2018, 11:16:37 AM »
Gil,

I know you are talking about CW as the mode however.....

 In 2015 I was building from scratch a Beach 40 DSB transceiver dead bug style on a piece of PCB. This radio was designed by Peter Parker VK3YE, I had just finished the receiver section, and the pre driver, and driver section, but was having problems with final amp going into oscillation, so I disconnected it. It was putting out about 300mw into the LPF measured without the final in the circuit. I was listening to a guy running a special event station aboard the Queen Mary docked in LA Harbor a distance of almost 1000 miles for my Oregon QTH while making the last connections to the mic amp stage with a electret capsule just hanging from some wires on the bench. I kept saying my call while looking at the waveform on my scope, Yep you guessed it, the guy returned my call sign and thanked me for checking into the Queen Mary. He gave me a 57 signal report with great audio. Keep in mind, I was running Double Side Band which means half of my power was going to the opposite side band, so that means I was getting out to S. California on about 150mw. You never can tell where your small signal is being heard. BTW, I had a lot of fun with that radio after I got the final amp section fixed, I made hundreds of contacts including one to Japan, all this on a bout 3 watts.

Joel
N6ALT

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