good points but,
first i never said there are laws stating the qrp levels . a novice knows this.
dont think i mentioned the display either.
mine is fine and as an old rf tech, im fully aware of the spurs and harmonics hence the shielded cable usage and filtering. why make a mountain out of a mole hill. i was running tube equipment way before the term qrp was associated with 5 watts. before ,,it was usually meant lower than 1000 or 500. 100, then 50 the 20 then 10 then 5. everyone has agreed in a gentlemans agreement to stay at 5 watts or lower. the ubitx is perfect for this. i also see alot of other super techs trying to make this radio out to be something it was not built to be . a full blown bells and whistles rig. its fine if you want to play surgeon but if the specs are brought down by simple shielding, filtering ,to acceptable levels by testing it on a spec analyzer, then go play with it. all radios have? fundamental problems.
1. the rig never satisfies the super tech ham . always wanting to push the limits. that is great because that is how we all learn and obtain new designs. im all for it.
2.the rig always has a quirk that some dont like? and will fight the companies to change. i feel that change is good but if someone is in alot of disagreement then rip it apart and rebuild it until finished. then publish the results and fixes. the rf amps have always been a problem for unique radio kits, but i find mine running at 4.5 to 5 watts to be pretty clean with my external filters and 45 mhz filter install.i was obviously making a general statement about the qrp levels. if you have been a ham for at least 25 years or more you will look back at the so called gentlemans agreement. always crank the power down to reduce splatter and interference to other fellow hams. foreign and domestic.etc.
i have run 2.5 watts into a wire inverted vee 15 ft off the ground and obtained my 1000 miles a watt award running an argonaut 509 on ssb. i have ran 1/2 watt ssb on 40, 20,10 and have worked all states. took awhile but it can be done and its fun. ashar made this rig with a control pot for the power so he is fully aware some might try to run it like an old patcomm? or sgc2020 or try to feed it into a full "gallon amp".those are very popular but has some harmonic issues and spur issues too.
ive seen this on new equipment that costs over 1000 and right out of the box.
one suggestion i have is tone the sharks down . everytime someone makes a suggestion and they
"feel" offended, then they start making jerk remarks towards the poster. when someone suggests something sometimes the suggestions just might work. just because someone else says it wont ever work, i say prove me wrong. i have made some suggestions and all i have received on this forum is snide side of face remarks. why is that? i have agreed with everyone on here about their theory and hypothesis. sometimes it takes a fresh approach, and a more simple outlook of the problem to solve . i aree with fred earliey yesterday. yes he is getting some resonance. so whats up with trying to make it sound like i said there is a law on qrp power?
reading way too much into someones posts . i never said that. all i stated was most hams know that todays standards qrp is 5 watts or lower. plain and simple. as for the 10 meter filters, every band on my rig is getting filtered individually. why? because every radio no matter ho cheap or expensive puts out some unwanted signals. today alot of super techs think just because blah blah blah said its a solid radio and you spend 3000 for it does not mean you can relax ur obligation to clean your signal. that is law.every radio i have new or old gets external filters to make sure i knock the heck out of the bad ones. why do you think we have so much junk signals on the band? because everyone assumes their 3000 dollar rig is clean.
crank the drive down, or change the amp circuit to be on another board inside the rig. simple. then if your still worried, rip all the relays and coils out and put them on another board too. maybe add some shielding. ohh and all interconnect wiring is shielded cable. done.
as for everyone here on the forum. i agree totally with? what they are doing. i have 2 or 3 who have given me sour grapes responses to my posts.im only trying to pass on some experience i have.? this is the first forum ive been on that polices how you type ur posts and complains if your suggest anything. ive watched the posts about the long traces under the relays. all im saying is :cut the fricking traces, use mini coax to run to connections and either relocate the relays or put everything into an external box.nothing offensive. i guess i come across rough like wayne green did in his magazine in 73 magazine. i mean try it. what have you to lose.
pretty good magazine but some didnt like wayne for his blunt responses. im the same way,. sorry. .
my other motivator? Doug Demaw. I have every book he published thru the arrl. great designs, simple to build and efficient qrp rigs. know what he did? just build it. and build them he did and used alternative circuits. like using diode switching instead of relays in some of his projects. anyone here try that? just a suggestion.
everyone should not be biased against someone just because ur miffed or upset etc because someone suggested something.it doesnt serve any purpose. by the way 100 watts was low power in the day. most of the big guns ran 500 or 1kw. i ran 100 or 50 when i could. when the new clubs came around with nifty ideas that were promoted in 73 magazine or ham radio horizons, they were fighting for our bands and wanted to cut down on the splatter,harmonics,and tvi interfence to the junk tv sets being sold.So most hams regarded the FCC requirements seriously and proudly by using external filtering when ever they could. thats what i was taught by my mentor. if in dought filter it out.and making sure ur antenna was proper measured and assembled and fed with the proper length of coax.
remember not everyone is wrong and no one is completely right all the time.
David
ka9koj
?
On Thursday, September 20, 2018 10:06 AM, ajparent1/KB1GMX <kb1gmx@...> wrote:
David Todd,
>>>you can change transistors rip coils out etc but if its originating from the mixer stage? or lack of shielding, moot point.all you need to do is add the 45 mhz filter in place of r27 and add external filtering for any given band.and run everything thru a filter to strip anything possible above 29.7 mhzi know some are trying to use this rig above 10 meters and turn the gain of the pots down. after all its intended for qrp operation.and most clubs recognize qrp as 5 watts now. technically 100 watts is low power compared to what we are all allowed to operate and what the old timers used to think...<<<
First its 10W PEP for SSB.? Also there is no law only contest rules what QRP is.? The problem is the amp is so nonlinear?
that at any power above 2W the IMD is poor and the spurs and harmonics are notable.? The latter harmonics do require
attention regardless of power.? It was sold and designed as a 10W radio it would be nice to be withing 3db of that and there
is no reason not to be better.
As to the comments around 29.7 there are two low pass filters to strip anything above that, however below that a collection
of stuff can and does escape.? Also the added 45mhz filter is a maybe fix as I've seen similar results from a 5db pad
we need a larger number of samples to say it really helps.
As to playing with the user interface and fancy displays.? If looks are important sure go color and touch screen.? If a clean
signal and all are important your looking to make it look way better than it is as all the stuff on the front panel will not
improve any of the analog RF out back.? ? Do I think the user interface work is cool, you bet I? do.? I'd rather apply that
to something electronically?impressive.
Allison
