|
surprising CW sidetone value in uBITX Manager 0.11
#ubitx
Mike KK7ER
I upgraded to CEC 1.08 firmware and ran the uBITX Manager Ver 0.11 software.
It shows reasonable values for most fields. However, it shows CW Side tone as 4294967295 Hz ( which interestingly is 0xFFFFFFFF). This is obviously incorrect since it is far beyond human hearing. In fact I'm surprised that side tone frequency in Hz is encoded with 32 bits. Seems like overkill. When I look for CW side tone from the LCD panel menu it is nowhere to be found. Hmm... CW speed in uBITX Manager is also shown as 4294967295. When I view CW speed from the LCD panel it is shown as 12 WPM. This implies that the register value should be 100. This leads me not to trust uBITX Manager. Should I? Either uBITX Manager is wrong or the LCD panel is wrong or... ? 73 Mike KK7ER
|
|
|
|
Re: surprising CW sidetone value in uBITX Manager 0.11
#ubitx
Mike KK7ER
BTW, I should mention that the version 1.08 that I installed was compiled from the tip of the master branch of the Git repository as of Sunday. I also tried the precompiled "HEX" file and it behaves the same way.
73 Mike KK7ER
|
|
|
|
Re: receive works great, but no trans power,
#ubitx-help
Jerry Gaffke
We have had a couple reports of Q90 frying, but not the mixer.
toggle quoted messageShow quoted text
Perhaps as Gordon notes, these were due to a strong VHF signal. I believe Gordon has suggested in the past the the failure mode might be due to reverse voltage at the BE junction, not forward current. I have no idea if the back-to-back diodes would significantly contribute to the spurs. Doubt it would cause trouble where I'm at, as there are no strong local broadcasters. I should try it, include a strap to remove the diodes if curious about some new spur. We've got plenty of electrical storms. Jerry
On Tue, Jul 17, 2018 at 01:28 PM, ajparent1/KB1GMX wrote:
It the signals are strong enough to fry Q90 the mixer will soon be gone too.
|
|
|
|
Re: RD16HHF1 power curve flattening...some
On Thu, Mar 8, 2018 at 05:14 PM, "John" <passionfruit88@...> wrote:
Hi John,did you mount the new pot in the front or back or just leave it on the breadboard ? kevin rea lancaster, calif. k6rea
|
|
|
|
Re: RD16HHF1 power curve flattening...some
MVS Sarma
I too suspect the devices OP bought. He could remove them and test with a DMM for the correctness of pinout. I am currently depending for my RD hhf and hvf devices, on an ebay seller " polida2008" after having suffered fake ones from another seller. This seller is now operating with another seller name " 5hk1584
" While i have no business deal with this seller(s), I do enjoy genuine devices for my hobby. Hope it helps. Regards MVS Sarma vu3zmv
On Wed, Jul 18, 2018 at 9:02 AM, Kevin Rea <reakevinscott@...> wrote: On Thu, Mar 8, 2018 at 05:14 PM, "John" <passionfruit88@...> wrote:
|
|
|
|
Re: RD16HHF1 power curve flattening...some
Ashhar Farhan
Are you sure that the pins are not shorting?
On Wed, 18 Jul 2018, 10:23 Mvs Sarma, <mvssarma@...> wrote:
|
|
|
|
Re: RD16HHF1 power curve flattening...some
MVS Sarma
Farhan jee the "c" mark on the right of Logo indicates that devices are fake.If IRF530 re labelled as indicated that they are fake. I had a bunch of therm. If some one doen't check under item details for a comment "Make: generic / unbranded" They do get fake ones. if we get IRF530 or so re labelled as RD16, Obviously there would be a short , of course through the internal protection diode. Regards MVS Sarma
On Wed, Jul 18, 2018 at 11:13 AM, Ashhar Farhan <farhanbox@...> wrote:
|
|
|
|
Re: RF power chain mods and improvements..
On Mon, Jun 11, 2018 at 03:54 AM, ajparent1/KB1GMX wrote:
MPSH10 was disappointing.I just tried these in mine too for pre-driver and drivers. <5w output.... I had some 2n5109 turn up today so will put them in tonight. One under the board one on top. as flat as I can get them... The BFR106 made a big difference in the SMT pre-pre-driver Q90 Will also try them in the 45mhz mixers... 73 Nick VK4PLN
|
|
|
|
Re: RD16HHF1 power curve flattening...some
Some fake RD16HHF turned out to be IRF510 on my tester. The pin
orientation was IRF and so was capacitance.
toggle quoted messageShow quoted text
They worked fine in my B40 boards. Raj
At 18-07-18, you wrote: Farhan jee
|
|
|
|
Re: I think this will work for the Ubitx...microphone
Mike Woods
Kevin If you search on miklor.com you will find the wiring diagram for the Baofeng speaker/mic. You will need to modify the mic to work with the uBITx (but not the BITX40 or BITX20) because the T/R switch is on high with 5v on it. Separate out the switch from the mic internally. M
On 18/07/18 9:53 AM, Kevin Rea wrote:
|
|
|
|
K5BCQ click fix 2nd generation installed
#ubitx
I didn't see pics of this in the site, so I thought I'd share mine. Continuity tests all look good. But, man tombstoning those surface mounts was hard! I Now understand why there was a REV 3. :-)
|
|
|
|
Re: The new uBITX boards are here
Dear Mr Farhan
As about me for several days I was asking for help as I've lost the original soft for scale and control of the Si5351. At last I've find HEX file by KD8CEC and I am happy that it works!( Used XLoader). But till this time did not find the original file and besides this I am not the Arduino specialist. A lot of words but no FILE and how to load it! To my mind the R50 feed back of the Q70 should be raised to 820K to raise collector U from 1.8 to 6 V - not to over load it by strong signals. Problems: great carrier in SSB mode TX, more then modulation speech signal! What is it? to use only in reception mode? The final 12 MHz filter is too wide and do not have 6/60 dB features, + some out of channel signals! But stii very simple and original transceiver not noisy with good sound! Some raising of the price of something 140-150 will not be too much for it. Best regards to you and your team 73! George UR4CRG/RX3ARG
|
|
|
|
Re: #ubitx #ubitx-help Not able to set up extension switches using CEC firmware
#ubitx
#ubitx-help
Yes, I followed the instructions on the blog and the video. The values that should have been reported by the manager are not the expected results
|
|
|
|
Re: receive works great, but no trans power,
#ubitx-help
Gordon Gibby <ggibby@...>
That would make for a very useful experiment! If you try it, let us know what you find out!
toggle quoted messageShow quoted text
It’s possible that different transistors have different reverse (base-emitter) break down voltages, which would dramatically change the amount of energy deposited on the base-emitter junction by a strong signals.... I just don’t know enough about the devices
to say for sure.
On Jul 17, 2018, at 23:30, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
|
|
|
|
Need a video on ubitx troubleshooting
Richard E Neese
I have a ubitx v4 it was workign fine on my 12v 3 amp power brick all fo a sudden whip transmitting the unit shut off and cam back on. Now the reciever is working fine but when I transmit I het a loud carrier with a hum to it and no audio output ... I figure something in the transmit section went bottoms up but looking at it with a usb based microscope I see nothign blown on the board no bubbles on chips and no broken or burnt wires.
any input would be helpfull
|
|
|
|
Re: Need a video on ubitx troubleshooting
Check voltage at R104, should be 0v. Sounds like CW is on!
toggle quoted messageShow quoted text
At 18-07-18, you wrote:
I have a ubitx v4 it was workign fine on my 12v 3 amp power brick all fo a sudden whip transmitting the unit shut off and cam back on. Now the reciever is working fine but when I transmit I het a loud carrier with a hum to it and no audio output ... I figure something in the transmit section went bottoms up but looking at it with a usb based microscope I see nothign blown on the board no bubbles on chips and no broken or burnt wires.
|
|
|
|
Re: receive works great, but no trans power,
#ubitx-help
Jerry Gaffke
That strap could cut Q90-base out of the circuit too, in case that causes RX spurs.
toggle quoted messageShow quoted text
Probably OK to leave the back-to-back diodes in there near Q90-base (to the left of C80) during transmit, as I doubt we have much more than 0.1vrms there. Unfortunately, I've got a very long list of stuff to do while the weather is good. Fiddling with the uBitx isn't on it. Jerry, KE7ER
On Wed, Jul 18, 2018 at 03:53 AM, Gordon Gibby wrote: That would make for a very useful experiment! If you try it, let us know what you find out!
|
|
|
|
Re: Low output Bitx40
Allen Woolfrey
Just finished wiring my bitx40.
Draws ~350ma with PTT, but no change at all when yelling or whistling into mic. (Dummy load present at all times, so don't suspect final blown.) I see lots of discussion around this issue, but would appreciate advice on how to troubleshoot. 72/3, Al - va3iaw
|
|
|
|
Re: Low output Bitx40
Al, check the electret condenser mic element soldering. Polarity is important.
toggle quoted messageShow quoted text
Raj
At 18-07-18, you wrote:
Just finished wiring my bitx40.
|
|
|
|
Re: Low output Bitx40
Allen Woolfrey
Thank you for quick reply.
Re-checked soldered correctly, and confirmed continuity to board connector.
|
|
|
