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Re: IRF510 insulation question
#v5
So I got the ceramic insulators.? The included bushing fits the screw just fine.? And the screw, without the bushing fits the wafer just fine. But put the bushing on the screw, and ain't nothing going in the ceramic hole...
They are (relatively) thicker than thin silicon wafers/pads. Which would not be a problem if... The hole were not too small for the insulating bushing. Which would not be a problem if... The ceramic material were not so hard and brittle that I couldn't drill or sand/grind it bigger. Which wouldn't be a problem if... I didn't want the heat sink and screw electrically isolated from the IFR510 case.? Which wouldn't be a problem if... I could return them. Which as a practical matter I can't.? Does anyone want a few of these to play with?? hahah. |
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Re: Help with Audio Chain - M1 and M2 Are Ground?
#ubitx-help
#v6
#v5
#v4
#audiocircuit
Put another way, maybe:? I can't figure out how the audio signal makes the trip from the audio pre-amp to the LM386 final amp.
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On Tue, Jan 21, 2020 at 12:26 PM, AndyH wrote: I'm trying to understand the flow of the signal through the audio amp and pop-fix FET (Q74 in at least the V6).? I *think* I get that in the amplifier stage around Q70 (V6) has a bypass cap to ground, as indicated by flag M1.? The 2N7000 Q74 (V6) appears to have both terminals 2 and 3 grounded (pin 3 via flag M2).? Is that correct?? Am I reading the schematic correctly that flags M1 through M4 are ground?? If so, it appears that grounds the CW tone input and VOL-H via the 1K resistor R70.?? |
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Re: : #V6 software issues help please
#v6
I can't speak to the rest from the vantage point of my modded V3, but it appears that item 1 has been and/or is being worked.? Ashhar reported it on Christmas day, 2019.
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/g/BITX20/message/74007 On Tue, Jan 21, 2020 at 02:33 PM, Neil k8it wrote:
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: #V6 software issues help please
#v6
Neil k8it
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Re: STM32F769-FT8-Transceiver
Charlie
Hello again. I finally got back on this project and am a bit puzzled as to which board stack on the headers. I ordered the adafruit proto board and it can be stacked with the nano or with the F769 board. However I can’t seem to find a way to stack all three together – maybe its just me. I have your latest release with the proto board showing the jumpers soldered. But haven’t found anything that shows the boards stacked or the backside of the f769 display. So my question is – which boards stack together? 73 Art N2AJO From: [email protected] <[email protected]> On Behalf Of Charles Hill Sent: Monday, December 9, 2019 8:32 AM To: [email protected] Subject: [BITX20] STM32F769-FT8-Transceiver Well I finally gotten the <> STM32F769-FT8-Transceiver project to a state worth releasing. I have placed the files required for making the project on Github at this location: <> I hope you enjoy the project. Regards, Charley |
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Reed,
for fast tune I was referring to the fast tune mode when selecting VFO twice. The accelerated tuning feature is also ?very nice. At very slow speeds more precise tuning is possible, as you speed up dialling the tuning incremental jumps are Appropriate and intuative. I’m having fun playing with the changes 73? Mick VA3EPM? |
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Help with Audio Chain - M1 and M2 Are Ground?
#ubitx-help
#v6
#v5
#v4
#audiocircuit
I'm trying to understand the flow of the signal through the audio amp and pop-fix FET (Q74 in at least the V6).? I *think* I get that in the amplifier stage around Q70 (V6) has a bypass cap to ground, as indicated by flag M1.? The 2N7000 Q74 (V6) appears to have both terminals 2 and 3 grounded (pin 3 via flag M2).? Is that correct?? Am I reading the schematic correctly that flags M1 through M4 are ground?? If so, it appears that grounds the CW tone input and VOL-H via the 1K resistor R70.??
Thanks! Andy? KG5RKP |
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Andy_501
开云体育Thanks Reed I have ordered in a new pencil iron with variable heat control and a number of varied selection of tips so won't be at this for a bit I want to add the extra morse jack for a straight key as has been suggested. My whole thrust on this project was to be able to do straight key cw primarily. I haven't looked closely at it, but am hoping the Morse key input option uses a different method to turn on the TX indicator without causing a cw rf o/p? lag as it does when keyed from PTT in CW mode. I have a couple of audio clips att here if of any use to others
to check BW and linearity spectrum. They are set to levels of just
under 32 mv or about 70% of the max mic audio input level; 1.
300Hz, 2. 3000 Hz 3. 2-tone 700Hz/1900 Hz I will respond wrt to freq step changes when I can squeeze in
some time to get it uploaded and tested. cheers & 73 Andy_501
On 2020-01-21 3:50 a.m., Reed N wrote:
My latest improvement effort is to make the knob dynamically change its step size, so when you're tuning fast, it goes fast, but when you're trying to get the exact right frequency, it will let you. There's a lot of subjectivity in this, so it's more of an art than a science (though there is some science to be had). 300hzSpectrumBase_31.25mv.wav
300hzSpectrumBase_31.25mv.wav
700-1900-2tone_31.25mv.wav
700-1900-2tone_31.25mv.wav
3000hzSpectrumBase_31.25mv.wav
3000hzSpectrumBase_31.25mv.wav
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Re: UBITX6 arrived today - cracked display
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On Jan 21, 2020, at 4:05 AM, support@... wrote:
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开云体育I USE A SPINNER KNOB ON MY VER 6 TRANSCEIVER AVAILABLE ON EBAY.
On 1/21/2020 9:53 AM, Reed N wrote:
Hi Mick, |
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Hi Mick,
4) When you say "fast tune" do you mean the "fast tune"mode when the VFO is selected twice, or the rapid acceleration you get when spinning the knob quickly? 5) The font is slightly smaller (both in code, and in number of pixels), but I tried to keep the original look fairly similar. 6) You're spot on about the flickering. At some point I hope to address that to the extent possible. Reed |
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Reed, |
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Jack, W8TEE
Reed: At one time I had written a short article for Doug Henrick's QRPp magazine for what I called "Fast Tune" that worked in the same manner using a timing interrupt. You're right, the rate is very subjective and I used a symbolic constant the user could set for their particular preferences. That said, I got a lot of people telling me they tried it, but couldn't get used to it, so they removed my code. The good thing you did, which I didn't, was to make it settable at runtime. That might make all the difference, especially if the rig is "shared" (e.g., multi-op at Field Day). Jack, W8TEE
On Tuesday, January 21, 2020, 4:51:00 AM EST, Reed N <greenkid336600+groupsio@...> wrote:
My latest improvement effort is to make the knob dynamically change its step size, so when you're tuning fast, it goes fast, but when you're trying to get the exact right frequency, it will let you. There's a lot of subjectivity in this, so it's more of an art than a science (though there is some science to be had). https://github.com/reedbn/ubitxv6/tree/knob-acceleration Joel (N6ALT) - I'd appreciate it if you could take it for a spin, since you seem generally up for some adventure. Mark/Smitty - I'd also appreciate your feedback, since it's building off of your work with the interrupts. Andy_501 - I've dropped the increments on the settings menus (among others, the local oscillator cal), so you may be interested in trying it out for that reason. I've attached a hex, since I don't think you've had success compiling? Reed -- Jack, W8TEE |
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开云体育Mine has definitely been modified because it’s supposed to only connect the mic not the speaker. UBitX is a 3 pin mic connector, but the BaoFengs by default are 4 pin, adding a pin for the speaker.? But I would expect the modifications to be made at the 3.5mm end, not inside the hand mic. If that was the intention, then they cut the wrong wire on mine. -Mark On Jan 20, 2020, at 5:04 PM, joshuaclough via Groups.Io <joshuaclough@...> wrote:
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开云体育Yep. The whole “testing testing, Kr6zy, haaaaaaallooooo” routine. Doesn’t even twitch the power meter.? On Jan 20, 2020, at 6:40 PM, AndyH <ahecker@...> wrote:
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开云体育I hope I’ll have an opportunity to look at this, but I’m headed into knee surgery soon and my priorities are shifting around a bit. :-/ -Mark On Jan 21, 2020, at 1:51 AM, Reed N <greenkid336600+groupsio@...> wrote:
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