Want one of these; search for “SGVU-L” @ ebay.
I am planning to use this in displaying RF-power measurement, but it needs some modifications. So stay tuned……………
Here is some more info:
I got this of ebay as a kit. PCB’s are very nicely build. Kit comes with LM3916 chips, which is a semi logarithmic VU meter LED driver.
Cascading six of these don’t really make any sense if you want to use it as a meter for readings.
So, I have replaced the LM3916 with one LM3915 logarithmic 3 dB/step driver chip for the ten first LED segments, then five LM3914 linear LED driver follows for the rest of LED segments.
Of course this is for one channel only, so you need 2 x LM3915, and 10 x LM3914 for doing both channels.
Testing the AE20401 5.8 GHz Frequency Counter / RF Power Meter kit from Ascel-Electronics.
Here testing a dummy-load for return loss @ 2,2GHz generated by the MiniVNA (old style) and the Extender. I measure 29.5 dB which equals about 1.07 in VSWR. Pretty good for this kind of equipment at these frequencies.
Meter hooked up the computer. The meter has a type A female USB jack so I had to make an odd Type A male to Type A male cable to get it connected. I have no idea why they have chosen to use this kind of jack in the instrument.
Also just in on my desk. The AE20401 5.8 GHz Frequency Counter / RF Power Meter kit from Ascel-Electronics.
This is a kit that has to be built from scratch.
ASCEL AE20401 kit
Just got the G4DDK VLNA or very low noise amplifier for the 23cm band in on my desk here.
This kit got an assembled PCB so there is only the final mounting of the PCB in its enclosure that needs to be done.
Yesterday I received the Si570 Controller and Frequency Generator Kit by K5JHF and K5BCQ.
And today, after 3 to 4 hours work the kit was ready for a test spin. My unit has the LVDS Si570 chip, the FIN-1002 LVDS to LVTTL converter with the TC1-1TG2+ output transformer. Here are a few pix…..
The Si570 kit
A few hours work and the kit is ready and working.
Generator output @ 56.320Mhz