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The crystal is on the green board under the display. Unplug the display and you'll see it. Vince.

Yup.? it is correct.? The easiest way to get the units right is? L in uH , C in uF and result will be in Mhz? ie recip of sqrt of micro x micro . But remember when you are working at VHF with 5

Ashhar: You give the number of turns necessary, and the core IDs, but what is the gauge of wire used??? David A Posthuma, WD8PUO 1 (616) 283-7703 Sent: Friday, November 09, 2018 10:35 AM To:

The Si5351 is on the back side of the board in the first picture, between the display and the board that the ATmeg board plugs into. The board with the plug is the Raduino board.

10pf series with .3uhy - resonant about 91 MHz 47pf series with 5.0uhy resonant about 10.4 MHz Is this correct? Brian - WA5RDG

THIS BOARD HAS A MEGA328P CHIP. I HAVE NO INFORMATION ON THE BOARD. I FOUND NO SI5351A CHIP? PHOTOS ATTACHED. W4NFR

Ooops, hit the wrong key. Yes, 100 nF.

Thanks Doug!

look in your software and see what frequency is set for the crystal. use a script that puts the oscillator right on a known frequency (best to use the crystal frequency) calculate how far off it is,

To see the 25MHz xtal on mine I had to pull the display. Vince.

I wondered about the cross-talk in the Si5351. There have been a number of papers written on it being problematic… to the point of suggesting using only one channel of the Si5351 but multiple parts

Bill W4NFR The picture you provided is the back side of an Arduino Nano board. The crystals on this PCB have nothing to do with the transmitting frequency of your transceiver. The SI5351a frequency

Excellent! So no second 45mhz filter, no surface mount inductors at L5,L7,? L1,L2,L3,L4 ? TP13 is not shown in the v3 schematics, only in the v4 schematics. I assume these mods work will work on the

Im trying to upload new firmware to the bitx40 and the arduino isn't recognized by the comp the red light comes on but no where in the device manager.? I know it isn't a cable because it recognizes

Scot, If you access this list from the website /g/BITX20/topics there is a search button toward the top.? Searching Baofeng Socket produces several hits including this gem

Allison is correct as usual, on further inspection, there is another crystal on the other side of the Nano board. I can not read the stamped information on the units that I have, even worse that the

Are you sure that in not the crystal for the CH340 USB to serial? All the Nanos I have the MPU crystal is on the front (side where the atmel MEGA328P many legged chip is). The likely cause of the 1khz

That looks like an Arduino Nano board, not the Raduino in a uBitx. I checked one of my spares and noted what could be taken as 20 J stamped in the crystal, though I thought the Nano was clocked at 16

HERE IS A PHOTO OF BOARD AND CRYSTAL. W4NFR --- This

Want to use a Baofeng mic on my BitX40 but have not been able to find sockets for the cabinet. Anyone know of where I could get them? Thanks, Scot WB7AVU