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Re: 2 12 volt batteries in series?
M Garza
That should work fine. Others have mentioned using a regulator (like a LM7812) ?to feed the radio and the direct feed (24v) for the PA. Good Luck Marco - KG6PRT On Fri, Mar 24, 2017 at 2:34 PM, peatmoss - ki6ssi <pete@...> wrote:
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Re: Long leads a problem?
I had a reduction in minor birdies and overall switching noises from the Raduino.? I get the same birdie from a completely different VFO also based on an Arduino chip, and SI 5351. And another receiver board not even close in design- ?I think the 7.2 bird is from the Arduino/SI5351 combo.? On Fri, Mar 24, 2017 at 4:04 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
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Re: Long leads a problem?
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On Fri, Mar 24, 2017 at 12:43 pm, Michael Davis wrote:
I get a birdie when receiving exactly on 7200. What might this be from? ? |
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Re: Tracking order
Normal. I ordered mine on December 25th. It was put in the mail a few days later, but once it was put in the bag, no more tracking occurred until it showed up in my mailbox a little less then 3 weeks later. Rich KC8MWG On Friday, March 24, 2017 3:26 PM, Ralph Mills via Groups.Io <rei_ten@...> wrote: I'm the same! No tracking update since "insert into bag" at Mumbai air on 3/14. On Wednesday, March 22, 2017 10:54 PM, davetelling . <davetelling@...> wrote: I ordered a bitx40 kit on March 6. Using the tracking number from hfsigs, I tried to use India Post "AfterShip" tracking, and the latest shows "insert item into bag (Otb)" on March 17 at "Mumbai Air", with no update since then. Is this typical? Does this mean that the part has not actually left Mumbai, or that it HAS left? Is there another tracking method I can use?
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Re: odd behaviour with new library si5351 v2.02 => strong tuning clicks!
Today there was again a new release v2.03 of the si5351 library. I immediately tried it, but unfortunately I still have very strong tuning clicks with this version. As is the case with the recently released v2.02, every time the raduino executes the set_frequency() command a loud pop is heard from the speaker. This doesn't happen with the v2.01 library. Can somebody try v2.02 or v2.03 just to see if the problem can be reproduced on another raduino, please? (you can always download and restore the old working version v2.01 from We may have to add an extra warning in the Wiki pages until this issue is resolved. 73, Allard PE1NWL |
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Re: Long leads a problem?
In what way did it improve? On Fri, Mar 24, 2017 at 11:53 am, Larry Acklin wrote:
Removing the excess unneeded wiring made a nice improvement for me.? ? |
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Re: Tracking order
Ralph Mills
I'm the same! No tracking update since "insert into bag" at Mumbai air on 3/14. On Wednesday, March 22, 2017 10:54 PM, davetelling . <davetelling@...> wrote: I ordered a bitx40 kit on March 6. Using the tracking number from hfsigs, I tried to use India Post "AfterShip" tracking, and the latest shows "insert item into bag (Otb)" on March 17 at "Mumbai Air", with no update since then. Is this typical? Does this mean that the part has not actually left Mumbai, or that it HAS left? Is there another tracking method I can use?
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Re: No uploads - support replied
No, it's the elephant in the room that everyone is ignoring! Roy WA0YMH On Mar 24, 2017 10:44 AM, "K5ESS" <k5ess.nothdurft@...> wrote:
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Re: Long leads a problem?
RG174 for the DDS too.? And use an old audio shielded cable from a PC CD drive for audio runs. The only unshielded wiring in mine is power.? Those are twisted.? Removing the excess unneeded wiring made a nice improvement for me.? I have mine in a plastic project box with an aluminum top, the radio plus raduino, a tight but usable fit.? And I removed the backlight display, replaced with non- saving 70 mA. Larry KB3CUF On Fri, Mar 24, 2017 at 2:43 PM, Daniel Acevedo <dan.ace86@...> wrote: I plan on keeping the speaker, power, antenna (will use rg-174), and tuning wires as short as I can. The longest part I suppose would be the volume and DDS connector because those would be on the lid of my enclosure. When I fully open the lid where my raduino is, it would obviously have to have leads long enough to open. |
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Re: Long leads a problem?
I plan on keeping the speaker, power, antenna (will use rg-174), and tuning wires as short as I can. The longest part I suppose would be the volume and DDS connector because those would be on the lid of my enclosure. When I fully open the lid where my raduino is, it would obviously have to have leads long enough to open.
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Re: Long leads a problem?
College Professor Simon Thompson
¿ªÔÆÌåÓýI will definitely use coax for the antenna connector and the DDS pair.
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Re: Long leads a problem?
Will probably work ok with longer leads, but with increasing issues such as birdies due to vfo harmonics mixing with the bfo, perhaps rf getting into the volume pot leads causing speaker noises when you transmit, perhaps clicks as you change frequency. ?Maybe even a 50hz jump in frequency when you press the PTT key. ?Hard to predict. The wire pair from Raduino to DDS connector on the Bitx40 would be my first concern. ?At least twist them together, better would be to replace that wire pair with some skinny flexible coax (50 or 75 ohms). ?Also twist or use coax for the antenna connector. ?Other connectors (two power connectors, speaker, ptt, mike, volume control center pin to ground) might want 0.01uF (or 0.1uF?) RF bypass caps. ?If you try any of this stuff and find it helps, do report back. ?The WireUp section recommends adding that 0.1uF cap across the tuning pot from center to ground, I'd recommend another such cap at the far end of those two tuning cap wires soldered directly to the Raduino pins. ? I've kept my leads fairly short, twisted the antenna and DDS wire pairs, added a tuning pot cap at the Raduino. ?Good enough for me. Jerry, KE7ER On Fri, Mar 24, 2017 at 09:31 am, Daniel Acevedo wrote:
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Re: Long leads a problem?
As a general rule, with unshielded wires, twist them. In particular, the RF leads on the back, and do keep those short. Dress leads close to the chassis if possible, and use small zip ties to tie things. down. As for unused wire, just use a small sharp object and release the pin in the plug. Save them for later modifications.
73 /paul W3FIS |
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Re: Long leads a problem?
Simon Thompson
I am curious about this, as well. On Fri, Mar 24, 2017 at 9:31 AM Daniel Acevedo <dan.ace86@...> wrote:
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Long leads a problem?
Reading the "Wire Up" manual, it says to Keep all the leads short. I am wondering if anyone has had any problems having the leads as long as they come.? I am planning on only keeping the leads long of the raduino because I will have a enclosure that has front panel with hinges. Everything else will be kept relatively short. |
Allard PE1NWL