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Re: How to get 5W on 10m?
What about adding a capacitor (like a 180pf or maybe a higher value) in parallel with r83? Would it increase the 10m power output without decreasing the output in the other bands (I wish I knew how to use LTspice)? Il 02/mar/2019 11:47, "iz oos via Groups.Io" <and2oosiz2=[email protected]> ha scritto:
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Re: uBitx V4 Audio extremely quiet and other needed mods#ubitx
Raj, I hope this is a joke and not a real true...? :/ Il 07/mar/2019 14:10, "Raj vu2zap" <rajendrakumargg@...> ha scritto:
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Re: Should I wait to buy a ubitx?
I wouldn't wait for a ver 6. Although I would have liked to read an independent and thorough SA analysis by users or a QST review with the ARRL measurements. Version 3 was deeply analyzed. Criticisms by Allison (SSB spurs above 17m) and Warren/Allison (unsufficient harmonics suppression) seems tackled in this version 5. The low audio issue typical of version 4 also seems solved for good. Il 09/mar/2019 05:36, "Jack Purdum via Groups.Io" <jjpurdum=[email protected]> ha scritto:
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Re: Which version of the ubitx board is currently shipping?
Yes it is Ver.5 On Sat, 9 Mar 2019, 9:58 am Kelly Mabry <kmabry2007@... wrote:
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Re: Which version of the ubitx board is currently shipping?
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On Mar 8, 2019, at 23:28, Kelly Mabry <kmabry2007@...> wrote:
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Re: Should I wait to buy a ubitx?
Jack Purdum
Something else to consider: Al and I have build a number of ?BITX's as have members of our Builders Group. All of them that we know about are within spec on 80M and 40M. All were also on spec on 20M, but 2 were "on spec", but close enough that it might be within or outside of spec on a lab SA. Both of those, however, were within 1.96¦Ò. So, if you only have an antenna for 80 and 40 meters, it's likely a moot question. If you plan to work 20M and below, I'd say buy it and see if it's in spec or not. If not, chances are you can sell it on this Forum for close to what you paid for it. I'd hate to see you pass up the enjoyment this little rig can afford you. You're going in with your eyes open and if it doesn't make you happy, you have a plan for recouping the lion's share of your cost. What the heck...Custer took a chance... My $0.02 are in the ring...stepping down from soapbox... Jack, W8TEE
On Friday, March 8, 2019, 11:02:57 PM EST, Brutus Laurentius <markhamfarm14@...> wrote:
We all have our biases, which include maybe a bit of projection ... and I'm projecting that this is a fun kit well worth buying. Now, in saying that, I am pretty handy with a soldering iron and hot air too, along with magnified goggles and good lighting.?? I believe, especially if you adjust Rv1 for 5 watts and do the other calibration required, you won't be getting cited by the FCC. My experience is with a V4 with all the ubitx.net "fixes" plus I? incorporated most of the changes (except for the IF frequency change) from the V5, as well as replacing the driver transistors, etc.? I ultimately put the filters on a little daughter card on top of the originals.? Next I'll be adding agc. I happen to have access to a spectrum analyzer at work, and with that done, as long as I kept the output below 7.5 w on my band of choice, I had nothing that was a problem.? ? A bit of patience, tweaking and fun, and at least for me, the rig has turned out usable! |
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Re: Should I wait to buy a ubitx?
Kelly Mabry
Brutus, you have said the magic words....hackable.? This has me hooked. Indeed, I will be ordering the? radio next month or so..due to finances. No I won't be selling my ts 590sg, hi hi.?
I welcome the things that I have learned from researching this radio... and all of you..on this thread. You CAN teach an old ham new tricks. Like the 9:1 un un I plan to build to utilize a long wire with the ubitx. Considering things like a tuner and or swr homebrew devices for qrp. 73,? Kelly K5AID? |
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Re: Should I wait to buy a ubitx?
We all have our biases, which include maybe a bit of projection ... and I'm projecting that this is a fun kit well worth buying. Now, in saying that, I am pretty handy with a soldering iron and hot air too, along with magnified goggles and good lighting.?? I believe, especially if you adjust Rv1 for 5 watts and do the other calibration required, you won't be getting cited by the FCC. My experience is with a V4 with all the ubitx.net "fixes" plus I? incorporated most of the changes (except for the IF frequency change) from the V5, as well as replacing the driver transistors, etc.? I ultimately put the filters on a little daughter card on top of the originals.? Next I'll be adding agc. I happen to have access to a spectrum analyzer at work, and with that done, as long as I kept the output below 7.5 w on my band of choice, I had nothing that was a problem.? ? A bit of patience, tweaking and fun, and at least for me, the rig has turned out usable! |
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Re: Should I wait to buy a ubitx?
There nothing call FINAL / ULTIMATE in any walk of hobby. Designs evolve sorting shrtvommings of previous, adding extra facilities, etc. IMHO, THERE IS NO POINT WAITING .? Obviously cost of making a rig would tend to go northwards, as material cost increases. V5 had solved many issues. Carrier supression is to be checked after aone or 2 calibration cycles. Calibration itself is not a difficult task. At hobby level most of us can't afford all T&M equipment at home. Thise who have are already serving the hams with their tests and improvement mods. We can perhaps implement them. All the best Sarma vu3zmv On Sat, 9 Mar 2019, 8:23 am Kelly Mabry <kmabry2007@... wrote: On Fri, Mar 8, 2019 at 06:37 PM, Dexter N Muir wrote: |
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Re: Should I wait to buy a ubitx?
Kelly Mabry
On Fri, Mar 8, 2019 at 06:37 PM, Dexter N Muir wrote:
Oh FGS, peeps. Buying a KIT does NOT get you a commercial RIG - it gets you the basis on which to work. I have a Bitx40 that I've never really got working in years (#4/9126V?). I might have, had I sussed out the whole-of-HF S8 interference. Help from the R.I tracked that to my disused VHF FT227 still powered up, but by then I'd taken down the dipole. I couldn't get hold of a 2N700-type FET to quell the Tx/Rx thump (I tried a transistor scheme that didn't work over 3 or 4 iterations), and won't get to it 'til I can afford some (I don't control the purse strings, and we have other more urgent (family) matters to deal with) - and the time and space to work on it, but I WILL! (and possibly AGC too). The love of RF - the very definition of "amateur Radio" - is in my very bones! Unless you go QRO with externals, the Bitxes are functional as presented. Spurs and harmonics? Piffle! GOTA! What nearby would likely be affected, let alone detect ithem? ?Gordon, I understand? your point.? Being disabled, I no longer have the resources for buying ready built gear. It takes months to squeeze? $$ for anything over $100 to$200. And Dexter, I am not saying this radio should equal a kenwood. Far from it.? I expect to struggle and modify this...I thrive on it. This is no noob ham here.? I am just getting opinions and logically proceeding. I am amazed at the work contributed in this group, et. al.? 73, Kelly? K5AID? |
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Re: Should I wait to buy a ubitx?
Oh FGS, peeps. Buying a KIT does NOT get you a commercial RIG - it gets you the basis on which to work. I have a Bitx40 that I've never really got working in years (#4/9126V?). I might have, had I sussed out the whole-of-HF S8 interference. Help from the R.I tracked that to my disused VHF FT227 still powered up, but by then I'd taken down the dipole. I couldn't get hold of a 2N700-type FET to quell the Tx/Rx thump (I tried a transistor scheme that didn't work over 3 or 4 iterations), and won't get to it 'til I can afford some (I don't control the purse strings, and we have other more urgent (family) matters to deal with) - and the time and space to work on it, but I WILL! (and possibly AGC too). The love of RF - the very definition of "amateur Radio" - is in my very bones! Unless you go QRO with externals, the Bitxes are functional as presented. Spurs and harmonics? Piffle! GOTA! What nearby would likely be affected, let alone detect ithem?
73 Dex, ZL2DEX |
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Re: Should I wait to buy a ubitx?
Gordon Gibby
¿ªÔÆÌåÓýIf you want to really well-finished, ?ready-to-go Rig, buy something built by some commercial firm. ? Different strokes for different folks!??If you want a fun radio project that will teach you a ton with the traditional frustrations and successes Of that kind of learning, the bitx line ?are wonderful devices. ? I have shipped one to Haiti as a receiver to teach a fledgling technician class
Of ?students, ?along with speaker wire to make a transmission line and Antenna. ?They will likely never be able to afford expensive foreign radios, so learning from the beginning to work with their minds and their hands is a good thing
Gordon
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Re: Should I wait to buy a ubitx?
Kelly Mabry
Thank you very much. With the spring coming up soon, I'm anxious to get out and do some portable work with a new qrp radio. The Shack I have is still in the works being built from the inside now. The money I would have spent into a portable say ft-817nd radio, I'm putting into my shack. And until that's done I can't operate my? radio. So it's very important to me to be able to go portable. I'm very impressed with the ubitx and I will have the case next week and the display from banggood.com soon. EVERYONE,? thank you for your input.
73, Kelly K5AID? |
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Re: Should I wait to buy a ubitx?
Kelly Mabry
Bill, I agree with the no amp comment. I have a TS590SG for that.
As for the other person's comment,? I am hoping to utilize this both qrp portable and mobile. I am a fatalistic optimist....(laughs are appropriate here) and I can merge a radio and maker hobby. Well Versed in arduino and pi architectures. No test equipment at my shack, but this seems fun and viable. $600 mobile rigs are nice, but not customizable,? which I prefer. I do not fear HW and SW; I embrace it....(hooo-peeeer). (Sorry for channeling my inner Vader) Kelly? K5AID? |
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Re: ScotchLok Two Wire Connectors
ScotchLoks are just another IDC (Insulation Displacement Connector) with the added bonus of silicone grease to weatherproof the connections. They're used all the time in the telecom & traffic signals industry, Certainly OK for low voltage/current. I think that keeping those wires as short as possible is the most important thing to be concerned about. You'll get no objection from me :) 73 de Mike
On Friday, March 8, 2019, 7:42:22 p.m. EST, Pat Anderson <anderson5420@...> wrote:
Anybody have heartburn if I were to use ScotchLok two wire connectors for the wires connecting the Raduino and the DDS instead of soldering them? I have used these connectors for most connections on my boat between GPS and autopilot and other devices that connect to the chart plotter. All solid as a rock so far.
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ScotchLok Two Wire Connectors
Pat Anderson
Anybody have heartburn if I were to use ScotchLok two wire connectors for the wires connecting the Raduino and the DDS instead of soldering them? I have used these connectors for most connections on my boat between GPS and autopilot and other devices that connect to the chart plotter. All solid as a rock so far. |
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Re: Should I wait to buy a ubitx?
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On Mar 8, 2019, at 7:02 PM, bill richardson via Groups.Io <ng1p.bill@...> wrote:
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Skip Davis
VE3MIC