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2N5109’s Just ordered some 2N5109’s from HSC, anybody else ordered these from them? They are about $2.50 each from mouser and even more from others but were 75 cents @ HSC, (marked down from

Right Jerry!!! That explains it! Around full power on SSB and sucked energy on CW!!! [email protected]> ha scritto:

The lowest inductance value I have is around 40nH, which would allow for a nominal Q=4 at 45Mhz. I merely made few computations and soldered. I need to check next weekends loss, actual Q separately,

Correction: So clk2 may get attenuated a bit at operating frequencies BELOW (not above)? 58mhz-45mhz=13mhz where 58mhz is the corner frequency of the new LPF.

Put a clip on ferrite on the wire assembly going to the Raduino from the encoder. I had something similar and this fixed it for me. 73s Marco - KG5PRT

Evan, I use a baofeng mic from ebay, actually I was using signal link usb for FT-8 . I can control the audio level. I tried with minimum mic level but problem does not go away. In normal ssb mode (

One point I forgot to mention was verifying that the K3 relay was in fact removing the audio to the audio amp. I did this by measuring voltage a TP21 (>1 volt receive <1 volt on transmit) and that the

A parallel resonant circuit is high impedance at your resonant frequency of 45mhz. It will suck away any energy that is not 45mhz, such as the undesired 90mhz harmonic during SSB operation. When

I just added the 100 ohm in parallel. Be fore soldering, you might want to verify by using a leaded resistor between TP21 and the end of the resistor closes to the audio plug. Key the mike while

Thanks Evan, did you mean I should open up the R70 and replace that by a 100 ohm resistor? Syed

The parallel resonator will need much higher q to be useful. The filtering out of the 90hz will be quite nominal. Have you swept this separately?

I have tried a slightly different solution for the spur. A screened 80nH tunable coil (like Coilcraft's) in parallel with a 150pf just across C22 and ground. These values should resonate at 45mhz and

Syed, CW involves only the final mixer and has lesser problems. In SSB some unwanted spur/Harmonic may be the problem. It's all about what your digital wires are picking up!

I found on my v4 board 2 issues that seem to be related: 1 - excessive sidetone volume on CW 2 - Feedback at high amplified mic settings going through the speaker to mic. I traced the solution to

Dear Raj, ??????????????? Thanks for your suggestion. I am wondering why not this problem then happen in CW mode? Syed

Syed, The antenna 2 pin plug wires may be radiating. Make them into a twisted pair and as short as possible to rear panel socket. If that does not work then cut the leads to a centimeter length and

For a while the CEC firmware latest version was only released in hex form, creating a lot of interest in loading the firmware from hex files. If the source code is now available, that is really the

Hi, ??? I am facing problem in ubitx v3, I am using cec 1.1 version. The problem is when my ubitx transmit in ssb mode "Set tune step?" or "General" or "Hamband" this type of text comes in the

Further to the above... I moved R81 from the specified 2K7 to 3K.? Q90 current dropped to 11 mA.? That stage is no longer producing gain.? Neither is the pre-driver, apparently. Using the Rigol

Hi guys me too for the board have got everything ready bought all the parts and 7" screen eyes not so good. But this sorta thing takes time and effort so will be patient.? Regards Barry