|
|
bragging rights here :? ?- f
|
Re: Using BITX40 with 15v battery?
Do you have a solar charge controller? ?It doesn¡¯t sound like it. ?15V is bad for the battery. ?It will cook it and will shorten it¡¯s overall life.
toggle quoted message
Show quoted text
On May 16, 2017, at 2:46 PM, Daniel Acevedo < dan.ace86@...> wrote:
I added a small solar panel to my 12v 7ah battery. Under direct sunlight, my battery voltage reads 15v and steadily drops to 13.2-14v in the shade. My question, is it safe to use the radio under these voltages without a certain mod, ie, bigger heatsink, or am I good to go?
|
Re: Using BITX40 with 15v battery?
Anything much over 12v is unsafe. ?See post ??/g/BITX20/message/26492
On Tue, May 16, 2017 at 02:46 pm, Daniel Acevedo wrote: I added a small solar panel to my 12v 7ah battery. Under direct sunlight, my battery voltage reads 15v and steadily drops to 13.2-14v in the shade. My question, is it safe to use the radio under these voltages without a certain mod, ie, bigger heatsink, or am I good to go?
?
|
Using BITX40 with 15v battery?
I added a small solar panel to my 12v 7ah battery. Under direct sunlight, my battery voltage reads 15v and steadily drops to 13.2-14v in the shade. My question, is it safe to use the radio under these voltages without a certain mod, ie, bigger heatsink, or am I good to go?
|
Re: Radunio BFO and sketch 1.11
Yes that was one great post Jerry, thanks!
73 Allard PE1NWL
toggle quoted message
Show quoted text
On Tue, May 16, 2017 20:42, Jerry Gaffke via Groups.Io wrote: If confused as to why the BFO had to be lowered to transmit an LSB signal
after flipping from a 5mhz to a 19mhz bfo, then check out
post??/g/BITX20/message/24724 (
/g/BITX20/message/24724 )?? That post gives everything in
round numbers so the discussion is easier to follow. ??On stock radios,
the BFO is around 11998500 hz. ??The crystal filter passband is about 3000
hz wide, and centered on around 11997000 hz. ??These frequencies are a bit
below 12.0mhz since the crystal filter uses the series resonant frequency
of the crystals (which is slightly lower than the parallel resonant
frequency), and the BFO has added capacitance around the crystal. ????
Jerry, KE7ER
On Tue, May 16, 2017 at 09:20 am, Allard PE1NWL wrote:
can??t exactly remember the required BFO frequency for LSB (while the LO
was on the high side of the IF), but I do remember it surprised me that
it
had to be lower than the original analog BFO frequency (I had expected
it
to be higher).
|
Re: Just ordered the BITX40
You are not purchasing a radio.? You are purchasing a kit.? Big difference. At least as far as the regs are concerned. ? ? ??
On Tue, May 16, 2017 at 2:53 PM, W9ZIM <darrendude@...> wrote: I remember seeing that discussion, but when I ordered a bitx40 this past Saturday, I didn't include any callsign information since there was never a point in the ordering process where it was explicitly requested.? DHL tracking says the package was just delivered to my house, so I wouldn't worry about it.
On a related note, 4-days from India to Ohio?? I'm impressed!
--
73, Joe W3TTT
|
Re: What a thrill ... first contact on Bitx40
George -? Exactly the same - 600 km first contact to Toronto from Baltimore.? And I was heard in Miami area, too. I have two tuning controls in my BitX 40v3 - built before everyone was using Radino.? I replaced the Surface Mount caps that controled the tuning with NP0 caps, and replaced the toroid.? That stabilized the frequency drift that plagued the early models.? Then I have the standard 10K pot (on right) and a 500 ohm pot for bandspread tuning.? No need for a 10Turn pot. I just added the circuit to eliminate the pesky PTT Whamp.? Now the circuit is usable on the air. ? Funny how everyone's BitX is similar inside but looks very different on the outside. ??
?
On Tue, May 16, 2017 at 3:12 PM, <george.ellis@...> wrote: Wired up the mic today and decided to call CQ! First call ?- ?success!! 600 km contact on 7 Watts was fantastic!
More surprising is the reaction of the other station when you let the Bitx40 cat out of the bag :)
Here she is - I think I'm going to enjoy this a lot...
--
73, Joe W3TTT
|
Re: What a thrill ... first contact on Bitx40
Great build.? Would you mind sharing some details about the construction?? My bitx40 just arrived in the mail and I'm considering how I want to box it up.
|
Re: What a thrill ... first contact on Bitx40
Now to build the CW circuit and attempt JT65 next...
|
What a thrill ... first contact on Bitx40
Wired up the mic today and decided to call CQ! First call ?- ?success!! 600 km contact on 7 Watts was fantastic!
More surprising is the reaction of the other station when you let the Bitx40 cat out of the bag :)
Here she is - I think I'm going to enjoy this a lot...
|
Re: Just ordered the BITX40
I remember seeing that discussion, but when I ordered a bitx40 this past Saturday, I didn't include any callsign information since there was never a point in the ordering process where it was explicitly requested.? DHL tracking says the package was just delivered to my house, so I wouldn't worry about it.
On a related note, 4-days from India to Ohio?? I'm impressed!
|
Re: Radunio BFO and sketch 1.11
... after flipping from a 5mhz to a 19mhz VFO ...
On Tue, May 16, 2017 at 11:42 am, Jerry Gaffke wrote:
after flipping from a 5mhz to a 19mhz bfo ?
|
Re: Radunio BFO and sketch 1.11
If confused as to why the BFO had to be lowered to transmit an LSB signal after flipping from a 5mhz to a 19mhz bfo, then check out post?/g/BITX20/message/24724? That post gives everything in round numbers so the discussion is easier to follow. ?On stock radios, the BFO is around 11998500 hz. ?The crystal filter passband is about 3000 hz wide, and centered on around 11997000 hz. ?These frequencies are a bit below 12.0mhz since the crystal filter uses the series resonant frequency of the crystals (which is slightly lower than the parallel resonant frequency), and the BFO has added capacitance around the crystal. ?? Jerry, KE7ER
On Tue, May 16, 2017 at 09:20 am, Allard PE1NWL wrote:
can?t exactly remember the required BFO frequency for LSB (while the LO was on the high side of the IF), but I do remember it surprised me that it had to be lower than the original analog BFO frequency (I had expected it to be higher). ?
|
Re: Just ordered the BITX40
There are lots of people on the list of buyers that did not
supply a Call.
I don't think there is a problem?? There is no law that I know of
in the US that says you have a Call to purchase a radio?
They just can't transmit?
Mike, WA6ISP
On 5/16/2017 10:55 AM, Aaron Heverin
wrote:
toggle quoted message
Show quoted text
|
Re: Just ordered the BITX40
Says they check callsign against name and address, well my delivery address is? my works address, and not home ?
Phil - G7BZD
|
Re: BITX40 Microphone options
i have the Icom HM-36 connected, works directly wired no mods as yet.
Phil - G7BZD
On Tue, May 16, 2017 at 6:36 PM, KC8WBK via Groups.Io <cruisenewsnet@...> wrote: Koss CS-130 is a good, cheap headphone with microphone, with two jacks.? It works with the BITX40 with no modifications.
|
Re: BITX QSO Night, Sunday, May 21, 9pm Local Time, 7.178 MHz
Last Sunday I had to go up to 71822 to find a clear spot. Maybe listening a bit further from the?default frequency will help.
Pat AA4PG
Pat Griffin
http://www.cahabatechnology.com
toggle quoted message
Show quoted text
BITX QSO Night, Sunday, May 21, 9pm Local Time, 7.178 MHz
Please note that the frequency is changing from 7179 to 7178 to move away from 7180 QSB.? Lets hope for better band conditions!
Join us as we make contacts from BITX40 to BITX40 on 7.178 MHz in 40 meters!
To participate, call CQ BITX at 9pm sharp, your local time, on Sunday. Call off and on for about 15 minutes. It is helpful if you call CQ BITX with your name and location.? Repeat your call a number of times if conditions are weak.
This is a worldwide event at 9pm in each time zone.? You may participate in any time zone, regardless of your location, so you may wish to call in at 8pm, 9pm and 10pm, your local time, whether you are on Daylight Savings Time or not. Feel free to call at other
times on this frequency as well, however try to make yourself available at 9pm local time to call and listen.
Report your QSO's, discuss propagation, noise, signal reports, audio reports, antenna type, etc. in this thread.
This is an undirected, scheduled event.? The BITX QSO Night relies on you to call CQ BITX to initiate contacts with other stations, so warm up that final and transmit a few calls at 9pm on Sunday.? Talk to you then!
|
|
|
Re: BITX QSO Night, Sunday, May 14, 9pm Local Time, 7.179 MHz
I tried at 8PM PDT, but heard no bitx40 calls, just a lot of QRM from other stations. I called CQ for awhile, with no response. I could see that my signal was making it to AZ (using websdr.com radio) but apparently, everyone was already in QSO, and no one was scanning for calls. I think I really need to get cracking on the audio interface so I can do PSK and JT65.
|
Allard PE1NWL
W9ZIM
