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Re: ND6T AGC implementation for uBIT-X

M Garza
 

I received mine also.
They are little works of art.

Thanks!

Marco - KG5PRT?

On Fri, Jun 1, 2018, 6:04 PM Daniel Conklin <danconklin2@...> wrote:
Kees,
I got mine today.? They are beautiful!? Thanks!
Dan, W2DLC

Re: ND6T AGC implementation for uBIT-X

Daniel Conklin
 

Kees,
I got mine today.? They are beautiful!? Thanks!
Dan, W2DLC
Re: boosting the power on 28 MHz #ubitx

 

If you use this one you will have a uBITX r4 . Although, he's putting them out with 510s, at this point, but used this mod In his own personal radio. Ashhar that is.?
Re: boosting the power on 28 MHz #ubitx

 

Allard no need to be so modest.? It is not bragging to say you are the man behind the curtain pulling the robot's strings.? You have a very interesting site.
--

Re: boosting the power on 28 MHz #ubitx

 


Allard,
That image below, what is that from?
Re: boosting the power on 28 MHz #ubitx

 

Just checked, wasn't sure if I had the RD16 or the 15, and it is the 16 , awesome, will put this high on the project list.?
Re: New VK4PLN Audio Daughter Board + BCI

 

Not sure I agree with this being the wrong part for a preamp in the uBITx.? First I always design in a front end high pass filter on my preamps¡­(that should be a fairly obvious requirement for any preamp or amplification stage¡­don¡¯t amplify things you don¡¯t want amplified). ?in this case I use a 5 pole chebby with a 3dB corner of about 18 MHz which works nicely for 12-10-6 meters.? Three 100pf caps in series and a two 330uH inductors to ground on the input is a decent design.? Second, variable gain control can easily be added.? The part has less than 0.5dB injected NF and therefore perfect as a preamp here IF DESIGNED RIGHT.? ?

?

You do know Elecraft uses it for their K3 preamp.? Must be something to it?

Dr. William J. Schmidt - K9HZ

From: [email protected] [mailto:[email protected]] On Behalf Of ajparent1/KB1GMX
Sent: Friday, June 1, 2018 12:17 PM
To: [email protected]
Subject: Re: [BITX20] New VK4PLN Audio Daughter Board + BCI

?

The PGA-103 is nice utility amp but too much gain for uBitx.? It needs more like a grounded gate Jfet
(10db is enough).? A wideband high gain without band limiting(tuned) will cause all sorts of havoc.

Allison

?

Virus-free.

image003.png

Re: boosting the power on 28 MHz #ubitx

 

¿ªÔÆÌåÓý

Allard,
That image below, what is that from?


Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com

On 6/1/2018 3:13 PM, Allard PE1NWL wrote:

On Fri, Jun 1, 2018 at 10:12 am, ajparent1/KB1GMX wrote:
I use the best tool I have for spotting 10 and 6M activity.

My radios
Yes. You're completely right.
Of course the best way is monitor the conditions on these bands is to listen 24/7 (and to call CQ frequently). Mono band BitX radios are a perfect choice for this purpose.

Most operators have a life next to ham radio though - For them an automatic alerting system that delivers alerts via email, SMS text, Twitter or push notifications, even when they're away from the rig, is very useful.

That Au and Eskip event didn't make it here, not yet.
Since my previous posting a few hours ago, MUF had been building and we even had 2m Eskip for about an hour. Perhaps it'll move to the US later today. So stay tuned!



73 Allard PE1NWL

Re: AGC circuit to try?

 

I have picked up some of the?MA4VAT2007-1061T MACOM SOIC-8 HMIC PIN DIODE VARIABLE ATTENUATOR? .?
If you look them up, you will see that it is a nice balanced dual pin diode attenuator on a chip. I thought it might work in the IF or just about anywhere . Work in progress, but definitely a very interesting chip.?
Re: The new uBITX boards are here

 

Thus increasing the gain of the q-90 stage at higher frequencies. Nice. Eliminate it altogether and it will work at 2 meters, right ? That way Ians wspr at 2 meters would work . lol (be very careful experimenting, you could have an oscillation in that stage without the cap) And thanks for pointing that out. Have you actually seen the board ? Does it use 510s or RD15s for finals? ?? N6GRG
Re: PTT Question

 

I put a SSM2167 compression module inside for $3.59.
--
Lee - N9LO? "I Void Warranties"

?
Re: uBitx sound

 

I think I'd ask someone what it sounds like on TX. If it sounds normal, don't adjust the BFO.

On Fri, Jun 1, 2018 at 11:48 AM, Tim Gorman <tgorman2@...> wrote:
Everyone has different needs. I personally like the bandwidth as it
stands. On 80m nets in a crowded band, the narrow bandwidth is a big
help in isolating net members from others only 2khz away. I know others
say my audio sounds "constricted" on transmit but it's not a lot
different than what many DX'ers use for maximum "punch" in a pile up,
again a big help on a net frequency on a crowded 80m band.

tim ab0wr



On Fri, 1 Jun 2018 13:07:34 -0400
"Ralph Mowery" <rmowery42@...> wrote:

> The filter on my ubitx seems narrow.? By feeding in a 1000 hz signal
> into the mic input and measuring the power output and then going up
> and down in the audio frequency I seem to have about a 1650 hz to the
> 3 db down in output power.? Only about 1800 hz or less? and the power
> out drops 10 db or more.
>
> I though by now someone may have tried to broaden the filter.? I have
> not had time to,but hope to lower the capacitors in the filter some
> to see if it helps.
>
> The small electric microphones seem not to be all that good either
> from several I tried.? I switched to a Shure amplified mic and get
> much better audio reports from several I talk to on an 80 meter
> sched.? I do feed it through an amplifier for about 150 watts to
> bring the signal up to what they are used to hearing me at.
>
> de ku4pt
>
>
> On Fri, Jun 1, 2018 at 12:21 PM, Lee <mr.olson@...> wrote:
>
> > Thank you all.? ?I like Jazz.? On my mp3 player I have a 3 piece
> > band. Drums, bass, and piano.? The drummer is playing on the snare
> > with brushes. I plug my SSB-Mite in it and it sounds good.? When I
> > flip the bypass switch to filter the drummer on the snare and the
> > bass disappear but the piano still sounds good.? .? When I tried it
> > in my uBitx it sounded better in bypass than in filter mode.? ?Now
> > I know why.? I can use it on other non-filtered radios.
> > --
> > Lee - N9LO? *"I Void Warranties"*
> >
> >
> > _._,_._,
> >?







--
Michael Shreeve N6GRG
Re: PTT Question

 

Not a new idea. My old (~1985) Yaesu FT-227R has that - 12V, RAW! You could run amps outta that!
Dex ZL2DEX
Re: boosting the power on 28 MHz #ubitx

 

On Fri, Jun 1, 2018 at 10:12 am, ajparent1/KB1GMX wrote:
I use the best tool I have for spotting 10 and 6M activity.

My radios
Yes. You're completely right.
Of course the best way is monitor the conditions on these bands is to listen 24/7 (and to call CQ frequently). Mono band BitX radios are a perfect choice for this purpose.

Most operators have a life next to ham radio though - For them an automatic alerting system that delivers alerts via email, SMS text, Twitter or push notifications, even when they're away from the rig, is very useful.

That Au and Eskip event didn't make it here, not yet.
Since my previous posting a few hours ago, MUF had been building and we even had 2m Eskip for about an hour. Perhaps it'll move to the US later today. So stay tuned!



73 Allard PE1NWL

Re: Amazon

 

¿ªÔÆÌåÓý

You can buy visa gift cards, $5.95 service fee for $100, didn't look at others.



With visa gift cards in hand, purchase via PayPal should be trivial.

HTH,

Ken, N2VIP

On May 31, 2018, at 7:50 AM, joe camilli <jjcamilli@...> wrote:

Any chance the ubitx could be offered via Amazom with the price to reflect the additional fees. The reason I ask is I have some Amazon gift cards to use up.
Re: Amazon

 

We have been looking at Amazon for some time. Amazon charges? heavy fee for their 'FBA'. It would add another 25 USD to the cost. We figured it wouldn't make sense to do that. We are still exploring if we can fulfill the orders on our own for Amazon customers. It is a call that HF Sigs will have to take. I only work around here...

- f

On Sat, Jun 2, 2018 at 12:50 AM, Terry Morris <terry.kb8amz@...> wrote:
I have used PayPal on Amazon.

Terry - KB8AMZ
Re: Nextion Display

 

Hello

does anyone have a working prototype image for the nextion/Ubitx. I have started exploring but need to retweek my skills with the editor. The last one I did was for a DMR interface and I started with a basic image from another user and adjusted as needed. A prototype would be great to work from

art N2AJO
Re: Amazon

 

I have used PayPal on Amazon.

Terry - KB8AMZ
630 Meters

 

¿ªÔÆÌåÓý

Hello Everyone!

???? Has anyone been successful in making one of these work on the 630 Meter Band?

Joe WB9SBD
--

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
Re: boosting the power on 28 MHz #ubitx

 

I always heard that 6 meters was the 'magic band' for the same reason.
Ooops, my bad. 6 meters IS "the Magic Band". 10 meters is just the
"Sleight-of-Hand" Band.

-- Rich WB2GXM
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