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Re: Low mic gain, was, show your mic
MAX
¿ªÔÆÌåÓýThank you Gordon. ? Humbled. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Gordon Gibby
Sent: Sunday, April 22, 2018 10:23 PM To: [email protected] Subject: Re: [BITX20] Low mic gain, was, show your mic ? Max, your web site is very impressive! ? great work!! ?
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Apology
MAX
I wish to apologize for my statements on the list last night. I'm not
going to make excuses. I shouldn't have said what I said and I know it. I'm likely to ask some stupid questions as I go along and I hope you all will be patient with me. Red in the face. 73. Max. K 4 O DS. P. S. I was not drinking. I've Never Lost the Wonder. Email: max@... Vacuum Tube Site: Transistor site: Woodworking site: Music site: To subscribe to the fun with transistors group send an email to. funwithtransistors-subscribe@... To subscribe to the fun with tubes group send an email to, funwithtubes-subscribe@... To subscribe to the fun with wood group send a blank email to funwithwood-subscribe@... |
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Re: show your mic
Jack Purdum
Yep, with a #2 on it.
Jack, W8TEE
On Monday, April 23, 2018, 8:13:21 PM EDT, Paul Schumacher via Groups.Io <wnpauls@...> wrote:
was it yellow?
Paul
On Monday, April 23, 2018, 5:08:09 PM PDT, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
Back when I was in school, I once wrote an essay with a manual graphite display generator.
Jack, W8TEE
On Monday, April 23, 2018, 7:01:26 PM EDT, William Cullison <wa8vih@...> wrote:
I made one from two carbon blocks, in a vertical configuration, with a dimpled area and a pencil sharpened at both ends. On Mon, Apr 23, 2018 at 4:07 PM, Dexter N Muir <dexy@...> wrote:
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Re: Practical CW Operation?
#ubitxcw
I put a SotaBeams DSP Audio Filter into my BITX40 and it works great. ?I have a 2nd one that I intend to use for my uBITX.
If you don't want to fuss with installing it in the rig you can get an enclosure for the filter and use it externally on different rigs. These filters outperform any active audio filter I have ever used.? There is also a small circuit board that is available from QRP Guys for the W0EB uBITX CW conditioning adaptor. This helps to make the CW keying more reliable.? |
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Re: Teensy 3.5/3.6 upgrade for uBITX
¿ªÔÆÌåÓýJackWell said. New tech license holders have a low cost incentive to get their general ticket and be able to join the community without fear of a steep investment.? Art - N2AJO? On Apr 23, 2018, at 8:05 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
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Re: show your mic
was it yellow?
Paul
On Monday, April 23, 2018, 5:08:09 PM PDT, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
Back when I was in school, I once wrote an essay with a manual graphite display generator.
Jack, W8TEE
On Monday, April 23, 2018, 7:01:26 PM EDT, William Cullison <wa8vih@...> wrote:
I made one from two carbon blocks, in a vertical configuration, with a dimpled area and a pencil sharpened at both ends. On Mon, Apr 23, 2018 at 4:07 PM, Dexter N Muir <dexy@...> wrote:
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Re: show your mic
Jack Purdum
Back when I was in school, I once wrote an essay with a manual graphite display generator.
Jack, W8TEE
On Monday, April 23, 2018, 7:01:26 PM EDT, William Cullison <wa8vih@...> wrote:
I made one from two carbon blocks, in a vertical configuration, with a dimpled area and a pencil sharpened at both ends. On Mon, Apr 23, 2018 at 4:07 PM, Dexter N Muir <dexy@...> wrote:
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Re: Teensy 3.5/3.6 upgrade for uBITX
Jack Purdum
I said almost the same thing a day or two ago...it has some really nice features, like a 12-bit ADC (4096 instead of 1024). Another important plus is that it can be programmed and run in the Arduino IDE.
Jack, W8TEE
On Monday, April 23, 2018, 7:01:53 PM EDT, Kees T <windy10605@...> wrote:
In keeping in line with Farhan's $100 goal for the Transceiver, I would seriously look at using the "Protoneer" mentioned by some others. It has the "Nano" form factor, is Arduino Zero based, runs at 3x the Nano speed, has 8x the Nano flash memory, 16x the Nano RAM, and has a DAC. Seems like that is a great opportunity to sweep in some open source code like that K3NG has for his keyer, other modes of operation, and many, many, more features over time. 256KB of flash memory is a LOT of available space. The Protoneer is $10 and you can get a group together to save on the $5 postage from NZ. I'm sure there are plenty of firmware writers out there. 73 Kees K5BCQ |
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Re: Teensy 3.5/3.6 upgrade for uBITX
Jack Purdum
I see the complexity and cost growing exponentially. That's fine but I
really don't see the uBIT-X as suited for going in that direction.??
It depends.? If you can fabricate a transceiver that competes with a rig costing 3x as much, why not? If your interest is hacking and DSP, why not? If you are trying to improve a rig with new/better features, why not? If you can have something that's better than, say an RS-918 at half the price, why not? Have you noticed how many people are standing on Farhan's shoulders and making his work even better? Also, an exponential cost function is probably not the case for most of the experiments that are going on right now. Look at the improvements Ian Lee has developed with almost no cost to the user. A lot of us are trying to convince the Techs with an HT and complaints that 2M offers nothing that their cell phone can't do to upgrade to General with an HF rig with reasonable power, features, and frequency agility. A lot of us are just working to move the tipping point for a lot of sideline people and if one of these new features pushes them over the edge...why not? That's the real genius that Farhan brought to the table: A rig that has the potential to make a lot of people sit up and take notice. Jack, W8TEE
On Monday, April 23, 2018, 7:33:17 PM EDT, Kees T <windy10605@...> wrote:
To continue a little further.....I see those who are interested in DSP and other number crunching applications will require a RPi, Teensy 3.5/3.6, or STM32F4xx/STM32F7xxx microcontrollers for standalone operation or as computer frontends. As a result, I see the complexity and cost growing exponentially. That's fine but I really don't see the uBIT-X as suited for going in that direction.? ? As Farahan said:??The ?BITX circuit design is simple enough to fit a single page. It¡¯s simplicity encourages you to modify, change and experiment (but keep it simple)......The ?BITX aims to fulfill such a need. It is a compact, single board design that covers the entire HF range with a few minor trade-offs. 73 Kees K5BCQ |
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Re: Teensy 3.5/3.6 upgrade for uBITX
To continue a little further.....I see those who are interested in DSP and other number crunching applications will require a RPi, Teensy 3.5/3.6, or STM32F4xx/STM32F7xxx microcontrollers for standalone operation or as computer frontends. As a result, I see the complexity and cost growing exponentially. That's fine but I really don't see the uBIT-X as suited for going in that direction.? ?
As Farahan said:??The ?BITX circuit design is simple enough to fit a single page. It¡¯s simplicity encourages you to modify, change and experiment (but keep it simple)......The ?BITX aims to fulfill such a need. It is a compact, single board design that covers the entire HF range with a few minor trade-offs. 73 Kees K5BCQ |
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Bitx20A bandspread
finally after all the years running a stock 20A I¡¯ve done the voltage stabilizing mod and the varactor tuning mod with a 10turn pot, and I think I¡¯ve worked out the L7 windings now to get into the phone section of the band. But as a result, the band spread is only about 25khz.?
I remember doing a tuning mod on a sw40+ Using a 10turn pot and the bandspread was small. There I added capacitance in the VFO and get nearly 100khz band spread with a 10turn pot.? I¡¯m thinking that by increasing C39 on the Bitx20A I should get more bandspread? ?Has anyone done this? I¡¯m I going in the right direction? I¡¯ll try it nevertheless but I didn¡¯t want to reinvent the wheel. Any guidance? Thanks! 72/73 de Chas ai4ot |
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Re: Teensy 3.5/3.6 upgrade for uBITX
In keeping in line with Farhan's $100 goal for the Transceiver, I would seriously look at using the "Protoneer" mentioned by some others. It has the "Nano" form factor, is Arduino Zero based, runs at 3x the Nano speed, has 8x the Nano flash memory, 16x the Nano RAM, and has a DAC. Seems like that is a great opportunity to sweep in some open source code like that K3NG has for his keyer, other modes of operation, and many, many, more features over time. 256KB of flash memory is a LOT of available space. The Protoneer is $10 and you can get a group together to save on the $5 postage from NZ. I'm sure there are plenty of firmware writers out there.
73 Kees K5BCQ |
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Re: show your mic
William Cullison
I made one from two carbon blocks, in a vertical configuration, with a dimpled area and a pencil sharpened at both ends. On Mon, Apr 23, 2018 at 4:07 PM, Dexter N Muir <dexy@...> wrote:
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Re: Teensy 3.5/3.6 upgrade for uBITX
I'd bet worst case latency on a not seriously loaded RPi is less than the
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milliseconds it takes us to load a new clock frequency into the si5351 via 100khz i2c. A google for "Rasberry Pi RT" shows there are real time variants of the kernel. I've got no idea how real time.? There are some going without linux, programming the bare metal. But I like the idea of still using a simple microntroller for basic rig control. Being something of a pessimist, I'd prefer not to depend on something as complex as the RPi,?too many billions of things that could go wrong. Jerry On Mon, Apr 23, 2018 at 11:01 am, Robert Weiman wrote:
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Re: Transmitter Mods
¿ªÔÆÌåÓýSo far I received 10 requests for parts
as of now. I have mailed out today 7, the remaining 3 will be in
the mail tomorrow. I expect the results to vary, because it if
transistor dependent. Please let us know how it works for you.
Also, thanks for sending me the QRP sticker. Some sent me money, which is a nice thought, but completely unnecessary. I have these 2 reels of parts, with 1000s of parts on each left over from an old business. The parts are 20 years old, so they have no resale value. I'm just happy they are being put to good use. I am working on some other changes, AGC and S meter. The AGC works well, but the S meter, not so well, so I need to work more on that. I will post the work when I finish. After that I will work on the 70 watt amp, which I mentioned before, and probably a preamp. Howard On 4/20/2018 7:14 PM, Chris Clarke wrote: Howard
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Re: UBITX Assemly Wiki Page
#ubitx
Sorry, should have said "sockets" instead of "switches".
-Jonathan |
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Re: UBITX Assemly Wiki Page
#ubitx
Bob,
Nice diagram!?? I had a question about your "N/C" notation on the switches.? In some cases the line between the pins marked with N/C is solid and dashed in others.? What is the intent of the notation? Thanks -Jonathan? KF6RTA |
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Re: show your mic
Carbon mics need a bit more bias current. Most can be revived by physical shock, breaking up clumps of granules packed by gravity in storage/disuse. Challenge: the carbon mic that got me into electronics and eventually Ham Radio, some 60-odd years ago! 73 |
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Re: Upgrade the software to Allard's version
#radiuno
#bitx40help
#nano
M Garza
Sergio, Please look at this message (/g/BITX20/message/21621).? Randy K7AGE measured all of the transistor voltages and attached them as a PDF.? Please measure the voltages on your board and compare to the document.? If you find something that is very different, that is probably your issue. Hope this helps. Marco - KG5PRT On Mon, Apr 23, 2018 at 2:52 PM, SaMa photo SaMa photo <infosamaphoto@...> wrote:
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alphaindia4oscartango
Jonathan