开云体育

It Lives !! Did many of the board mods, added RX amp/attn/agc, changed/added RX audio chain, added F/R power meter & S meter, VOX, sound card interface, and fan. TX power is still about 6db down from

If you put a 3-5 amp rectifier in series with the positive lead you will not blow fuses or damage any parts due to reverse polarity. The .7 volt drop will not be noticeable to you or on the receiving

Hi, A fuse may or may not prevent damage to the gear that is downstream - your rig. It is likely to limit damage but something has typically already failed to blow the fuse. Progressive damage will

Jes The reason to have a fuse is to limit damage from an over current condition. I sense the fuse does not have to be too close to the nominal operating current, and possibly there can be some

Apologies if this has been asked a hundred times already, but what is the ideal rating for the reverse polarity fuse on a ubitx. I think I read somewhere that 2.5 amps is probably the ideal rating,

Thank you Jack... one has to know where to look! Sometimes there is just Toooo much. Thanks... will try it. Jeff ve3coj

Try the earpiece from an old cradle type telephone. The carbon mic element is not advisable since it has an inherent hiss that may have to be filtered out. The earpiece has a diode-looking device

@David, you can post your design in https://www.thingiverse.com?There are some uBitx posting there already. You can just add STL file or also include design files as well.

If you look at: phdlee/ubitx | | | | | | | | | | | phdlee/ubitx ubitx - sketch for the raduino to work with the ubitx transceiver - phdlee/ubitx | | | you can see the header file listed there.

Hi Jack... Well no luck finding a ubitx.h header in any Sketches I could find... Anyway, I reverted to uploading Hex files and the transceiver is up and running first upload!. Thanks for your help and

Jeff, ? ?If you desire to work through the process of understanding the Arduino IDE, library management, and the way different IDEs behave, please let us know which version of the IDE you're using,

The ubitx.h header file should be in the directory with Ian's *.ino files. It is part of the download. Jack, W8TEE

Thanks for that Yigal, but my problem is on receive, so I think it must be the audio output amplifier. I haven't tried it on transmit yet, I'm just getting back into ham radio after a gap of about 10

Thanks to all that have responded... sorry for the preamble but I think It's necessary. At this time I am just trying to upload the software to the NANO. I have tried the original software to the

In mine it's the 12 MHz crystal filters that cause the problem. You can rake a small plastic tool over the top and they clatter like crazy. Would grounding the cases help?? I hate to put heat on them

See a possible solution:https://ubitx.net/2018/11/25/solution-to-ubitx-main-board-microphonics/

Has anyone tried a carbon mic with the ubitx? How to wire it? The Shure 104C manual seems an interesting starting point.

Thanks for the link Woody.? I'm looking forward to betting some more amplification in this ubitx, hopefully it helps.

Thanks for the advice. I will probably start by 'scotch taping' the eletret to a pencil to test things out and improve the form factor after it is up and running. For now I am focused on soldering

It's amazing what a little thought can do. My son was hired by a multi-national pharma company as a programmer. Every night they would get sales reports from all over the world. Then, at 1AM, a batch