开云体育

John Well one step is to remove and bypass the pa devices. One can imagine the transmit drive will reduce to the vicinity of what you seek. I would use search engine ubitx transverse to see what has

Thank you for your help.? Have started installation of the 5351-- have an Adafruit board on hand.? Some other priorities have intervened but will report back when there is some progress. -- David

Richard, Don I have tested a few transistors and will send them out to you. Please sent me your address in e-mail. All others will have to wait a couple of month, I am going on? a business trip,

What is the pri / sec ratio you are looking for?

If you are just looking for a coupling transformer that will couple signals at 433.9 MHZ, then you could build your own with just a few turns for primary and secondary. I suspect what you may be

You need to keep the PA operating within its linear range. Turning down the bias may make it operate in its non-linear range. Take a look at the load line diagram in the device datasheet to see how

he can turn down "drive" to get lower output turning down bias makes distorcion (clas c and not class a or class ab) so drive lower ... yes ... bias lower ... no in fact a higher bias gives cleaner

Thanks John for your answer PB:? ?i don't found any reference for a 433,9 mhz transformer ! some ideas cdt

John - Couldn't you just turn down the PA BIAS until you get the output you need? 73, Justin KI5GKD

John, realizing it’s not quite what you are asking for you might take a look at the Transverter-Store attenuator board. It’s got on board in/out switching and is only 20 bucks shipped. I went

Ordering a uBitx v6 Thursday to use as a transverter rig for a transverter that needs between 1 mW to 750 mW input on 10m.? Anybody have any suggestions on how to mod the uBitx to limit output to

Mini circuits, or if you want to do filter use one of the cheap Murata or similar ceramic filters.

A cheap desk mic for ubitx in Nuts & Volts

Hello, Yes, I know TinySA, but the goal here is more educational on construction and development. Doing with your hands is more rewarding than buying at all. This will be for the next long winter

what about using an arduino and control a si chip as a tuneale clock like we du in bitx depending what clock you use (and if you add a clock divider to a faster unit) you can do wide or narrow

Hello, Do you know where to find a 433.9 mhz transformer like TOKO case in Europe? or how to do one? It’s possibly for this montage. Nothing decided. Un analyseur de spectre pour oscilloscope

John, I'm part of a brave group building homebrew simple transceiver.? If you have one or two left, I and the group would put them to good use?

Hi Evan, OK all clear now. Unfortunately even in FAST position (the position I normally use), it looks quite slow, but that's not such a big issue. Thanks Giuseppe IZ4JUK

Hi Giuseppe, You should see a change from the Fast to the Slow setting of the AGC corresponding to the speed of the S Meter update.? The value you are measuring in the S Meter function is the bias

Sounds like Gary is affirming 1206 sized resistors. Many of us found that c81 needs to be experimentally determined, as its part of an equalization network. Mine without Allison's redesign needed