Re: Raduino Clone kit from W0EB-N5IB
#ubitx
I can't truthfully answer that. ?It was designed after the uBITX Raduino and plugs into the 16 pin Raduino socket on the uBITX just like the factory's Raduino for the uBITX. You'd be on your own trying to adapt it for the BITX40. ?Not sure if the BITX40 software would work on it either.
Jim
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On Aug 17, 2018, at 8:55 AM, V Zecchinelli < n1vin@...> wrote:
Hey Jim,
Will this PCB also work with BitX40?
Thanks,
Vince, N1VIN
On 8/17/2018 9:50 AM, Jim Sheldon
wrote:
The new Raduino Clone boards arrived Wednesday.? Kits are back in
stock and available for order
$6 post paid in the US for the bare board, $8 (USD) postpaid for
international orders.
$25 postpaid for a complete kit including a pre programmed Arduino
NANO loaded with the factory version 4.3 code from Github.?
International orders $40 (USD) shipped as international postage is
$14.50 for the kit.
$35 postpaid in the US for the complete kit as above but with the
Si5351 Clock Chip already soldered in place and continuity checked
for good connections and no shorts between pins. $50 (USD) shipped
internationally
Further details and contact/ordering information can be found on
Jim, W0EB
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Spurious Emission Measurement on stock uBitX
Hi, all.
Attached is a PDF file which shows the results of measuing spurious emission on my uBitX which I haven't modified its hardware/software at all.
Here, in Japan, the spurious emission should be less than -50dBc and so the list indicates I can use my uBitX with a Pi-C antenna tuner, but not on 15m unfortunately.
This time, I checked only the CW transmission beccause I had a problem to measure SSB case. It would be very much appreciated if someone could advise to me.
To measure the spurious emission on SSB, at first I need to saturate the PA output by the mic input of so called "pseudo voice" that is 1.5kHz sine wave, and when the output is saturated by increasing the input leve, then 80% of the input level will be used to measuer spurious emission, the Lab guy explained to me.
However, uBitX output won't be saturated which means I couldn't observe the flat level of PA output as increasing the input (pseudo voice) level, but suddenly the output level falls down to a few mW.
The Lab guy said it would be because uBitX didn't have an ALC - Auto Level Controller of the mic input.
So please advise to me how I can saturate the output (PA) level with such a "pseudo voice" input? Maybe bring an external mic compressor? However, how can I observe the flat level of PA output?
Thank you for reading my long email. Hope someone can help me. If you are interested in screen shots of the spurious analyzer, feel free to email me.
BR,
// hiro, JJ1FXF
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Re: Help with AGC kit wiring
Make sure you have not switched the power connection and the ground on the board.? Seems to me that when I was hooking mine up the markings on the AVC board were not what I was expecting. Caught that and it works fine.
On Fri, Aug 17, 2018 at 2:22 AM, Kai Nilakari <kai.nilakari@...> wrote: I assembled the SMD kit by Kees. However it does not work at all. The silk screen print on the component side shows 1 uF tantalum capacitors wrong way around.
After my mistake I replaced them but something is loading the 5V supply lm7805 down and the transceiver starts screaming even with no audio connected yet.
After some measurements I found out that left most pin carries 4.8 volts and the RF board shorts it to ground.
Should I add a 100 nF capacitor in series to the?
left most pin to prevent the short??
I was lucky, nothing blew up but I think I'll make the scratch & solder version rather than struggling with the stamp-sized SMD kit.
_
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Re: Raduino Clone kit from W0EB-N5IB
#ubitx
Hey Jim,
Will this PCB also work with BitX40?
Thanks,
Vince, N1VIN
On 8/17/2018 9:50 AM, Jim Sheldon
wrote:
toggle quoted message
Show quoted text
The new Raduino Clone boards arrived Wednesday.? Kits are back in
stock and available for order
$6 post paid in the US for the bare board, $8 (USD) postpaid for
international orders.
$25 postpaid for a complete kit including a pre programmed Arduino
NANO loaded with the factory version 4.3 code from Github.?
International orders $40 (USD) shipped as international postage is
$14.50 for the kit.
$35 postpaid in the US for the complete kit as above but with the
Si5351 Clock Chip already soldered in place and continuity checked
for good connections and no shorts between pins. $50 (USD) shipped
internationally
Further details and contact/ordering information can be found on
Jim, W0EB
|
Re: Raduino Clone kit from W0EB-N5IB
#ubitx
The new Raduino Clone boards arrived Wednesday.? Kits are back in stock and available for order
$6 post paid in the US for the bare board, $8 (USD) postpaid for international orders.
$25 postpaid for a complete kit including a pre programmed Arduino NANO loaded with the factory version 4.3 code from Github.? International orders $40 (USD) shipped as international postage is $14.50 for the kit.
$35 postpaid in the US for the complete kit as above but with the Si5351 Clock Chip already soldered in place and continuity checked for good connections and no shorts between pins. $50 (USD) shipped internationally
Further details and contact/ordering information can be found on
Jim, W0EB
|
Re: ubitx compared to Elecraft or Xiegu for spurs
#ubitx
Sunil,
It takes a lot of hardware to get predistortion and CFC to go.
Basic clean is not that hard though even if the Anan is easily 10 to 100X better.
But you have to start with a good design and then take out the easy flaws,
the harder ones are then better isolated.
Allison
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Re: Help with AGC kit wiring
Kai,
Sorry that you're having difficulties. The wide band on the silkscreen was to indicate the end toward which the positive (banded) end of the capacitor should be connected. Your photo shows it correctly. I'm curious as to which marking you were referring. You did check my web page, right?
By "left most pin" are you referring to the volume control? If it were pin 1 (under your jumper) that would indicate that you have voltage on your receive RF lead and you would need to look for a soldering fault.
If it's on J1, then check C2 for short circuit.
No additional capacitor required, let's find the culprit. Keep me posted, please. 73, Don
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Re: Help with AGC kit wiring
I assembled the SMD kit by Kees. However it does not work at all. The silk screen print on the component side shows 1 uF tantalum capacitors wrong way around. After my mistake I replaced them but something is loading the 5V supply lm7805 down and the transceiver starts screaming even with no audio connected yet. After some measurements I found out that left most pin carries 4.8 volts and the RF board shorts it to ground. Should I add a 100 nF capacitor in series to the? left most pin to prevent the short?? I was lucky, nothing blew up but I think I'll make the scratch & solder version rather than struggling with the stamp-sized SMD kit. Kai, OH3WE 
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Re: ubitx compared to Elecraft or Xiegu for spurs
#ubitx
Allison,
? ? ? ? ? ? i have been an early adopter of an ANAN100D .Still? run it daily with Predistortion and CFC etc.
i aslo run the UBitx v3 harmonics spurs and all. Have seen the harmonics and spurs on the Ubitx on my SDR panadpter screen. The price ratio of the ANAN100D to the Ubitx here is greater than 25:1.
Perhaps a future Ubitx ver.XX will feature Predistortion ad CFC tools etc and still be 25 times cheaper than the ANAN XXXX .
73
Sunil VU2MTM
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Re: ubitx troubleshooting help - low power after irf510 replacement
Yes that’s probably true. ?Had had a few fakes components. ?Just because it label as something it’s actually something else.
But it waste your life trying to fault find something that isn’t real. ?Frustrating ?
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On 17 Aug 2018, at 1:40 pm, Mvs Sarma < mvssarma@...> wrote: Praba jee ?Mark? could be right ?if some one buys RD16 devices, ?perhaps faking is possible?? like using IRF and we know that. ?But irf 510 perhaps no one need fake them. all the best
sarma ?vu3zmv
On Fri, Aug 17, 2018 at 8:51 AM Mark McNabb < n7eku@...> wrote: On Thu, Aug 16, 2018 at 11:17 PM, Sean W7SKD wrote:
First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it.
I'll put $10 on that :-\
73,
Mark.
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Re: Ubitx - Increased voltage to finals thru middle wire on power plug...no effect
Wow something not right there. ?You got current limit on ? It’s very voltage sensitive. ??I’m getting on 20m 13.8v 14watts cw (2.2amps). ?At 17volts 20watts at 2.7amps. ?
 Lovely 3rd can be seen. ?Doesn’t change with pa voltage.
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On 17 Aug 2018, at 12:06 pm, John < vk2eta@...> wrote: Correction Kevin, no need to key the rig. I forgot that the finals are always connected to the power supply.
73, John
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Re: ubitx troubleshooting help - low power after irf510 replacement
I guess this image says it all. Experience and image courtsey Sandeep Lohia VU3SXT.
Rahul VU3WJM
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Re: ubitx troubleshooting help - low power after irf510 replacement
Praba jee ?Mark? could be right ?if some one buys RD16 devices, ?perhaps faking is possible?? like using IRF and we know that. ?But irf 510 perhaps no one need fake them. all the best
sarma ?vu3zmv
On Fri, Aug 17, 2018 at 8:51 AM Mark McNabb < n7eku@...> wrote: On Thu, Aug 16, 2018 at 11:17 PM, Sean W7SKD wrote:
First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it.
I'll put $10 on that :-\
73,
Mark.
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Re: ubitx troubleshooting help - low power after irf510 replacement
On Thu, Aug 16, 2018 at 11:17 PM, Sean W7SKD wrote:
First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it.
I'll put $10 on that :-\ 73, Mark.
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Re: ubitx troubleshooting help - low power after irf510 replacement
Look like you are ended to fake IRF510 from china
On Fri, Aug 17, 2018 at 8:47 AM, Sean W7SKD <sean.jrdalys@...> wrote: I replaced both, yes. First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it.
Have been looking for visibly cooked bits in the amplifier section, but so far no joy...will continue though ?
thanks
Sean
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Re: ubitx troubleshooting help - low power after irf510 replacement
I replaced both, yes. First time I have replaced with “international rectifier” marked parts from asia, which is why I was wondering if that may be it.
Have been looking for visibly cooked bits in the amplifier section, but so far no joy...will continue though ?
thanks
Sean
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Clarification Please: I have version 4 uBitx Board. My primary mode is SSB. What bands, if any, are currently tested passable for SSB mode?
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Re: Ubitx - Increased voltage to finals thru middle wire on power plug...no effect
Correction Kevin, no need to key the rig. I forgot that the finals are always connected to the power supply.
73, John
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Re: Ubitx - Increased voltage to finals thru middle wire on power plug...no effect
Kevin,
Increasing the voltage to the finals only helps if there is RF drive enough to?
take advantage of it.
Its true for the IRF510, RD16HHF, MRF150.? They all have so much gain
and more voltage does not significantly increase that.
Likely if you were not limited by the TD2822 and you increase the 12V to
say 14V you would see a corresponding increase output power.
Most all of the uBitx I've encountered had a mod to keep teh voltage to the tda2822
and tuning up the voltage from 12 to to 13.8 made a noticeable difference on any band.
Like John said also make sure you actually are delivering increased voltage.
Your power supply could be fading under the current draw.
Allison
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Jim Sheldon
HIRO, JJ1FXF
Don, ND6T
David Posthuma