Should you have Nokia UMTS module here is something that you may like. Mouser has a converter from SMPMAX (that special connector on the palet) to SMA... Mouser No: 538-73386-1560 Currently they are out of stock but seems to be available again in March. 73 de Béla HA4BM

look in the files section for more info on conversion or if you want to buy one ready built then either look on Ebay on my listings (littleg7ntg) or email me on thebigclunk@.... Price is dependant on connectors fitted and size of fan but starts around £300GBP + postage

I bought this amplifier from Bison Electronics Poland then I removed the circulators which were for 2100MHz. After bypassing the small circulator and fitting semi-rigid to in and out plus power cable, I tested it at 2400Mhz and 32 volt supply and got 190 watts output for 40mW input without any tuning. Supply was 22 amps at 32 volts so not very efficient. I didn't test it for long as my heatsink is too small but it is very linear. The topology is Doherty and draws about 1.5 amps no load. I am very tempted to leave it as it is as that is more than enough power even if it is only 27% efficient. When I get a suitable heatsink I will do more testing. Now fitted to good RS heatsink with fan and fitted in diecast box. It now gives me 200 watts out for 20mW (13dBm) input for 18 amps at 32 volts supply Saturation is at 250 watts for 100mW input and about 30 amps supply! P1dB is about 220 watts at 39dB gain linear gain about 40dB I have plenty of 250 watt amplifiers so I will sell it at the right price.

power meter on ebay - copy and paste; https://www.ebay.co.uk/itm/203344402652?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

I have found that diode type as a big effect on the scale linearity; BAT41 (100v 200mA) gives a nearly linear scale for the 200W range BAT62-02 gives a more log type scale like a Bird power meter and needs a series resistor. I can offer both types of scale now.

slight amandment to schematic due to variations in diode characteristiscs

a simple power meter mainly for DATV 23cms or 13cms see files section

As I have had some interest in a simple low cost 2.4GHz power meter, I have built a prototype which seems to be reasonably accurate (about +/- 5% dependant on the method of producing the scale) . This one uses a coupler about 25dB, a diode detector using a BAT62-02W, a 100k pot and a cheap chinese 50uA meter FSD is 200W (the rating of the coupler) It would be easy to make but the only drawback is that it would need calibration against an accurate meter. I can do that no problem but most people don't have test equipment. I will make a few more prototypes over the next couple of months and see what the repeatability is like and then I might offer some for sale. This one is crude and made with bits out of the junk box and is a single range. I may look at dual range meters. To measure return loss , you merely turn it round and calculate from the different readings. Cost of parts including a box is around £35 so if anyone builds one and wants it calibrating , then just send it to me! I reckon my test gear is accurate to a couple of percent.

The following files have been uploaded to the Files area of the DATVPA@groups.io group. * /Modifications to board from Bison Electronics with three x BLF8G22LS.docx ( https://groups.io/g/DATVPA/files/Modifications to board from Bison Electronics with three x BLF8G22LS.docx ) *By:* James Smith