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Re: 25 volts and output wattage

 

did u turn up the base to the final for the xtra power.? I did mine on the scope just below hearing a carrier get thru and backed off just a hair.

On Fri, Mar 31, 2017 at 10:06 PM, Tim - K7PTM <tamccain@...> wrote:
I am using an analog watt meter, so it is possible that it is not responsive enough for me to see the higher wattage. ?


Re: 25 volts and output wattage

 

Much bigger I also have a fan running on mine just in case i get long winded.

On Fri, Mar 31, 2017 at 10:05 PM, Tim - K7PTM <tamccain@...> wrote:
The PA connector can take 25 volts, but you must have a bigger heatsink.


Re: 25 volts and output wattage

 

I am using an analog watt meter, so it is possible that it is not responsive enough for me to see the higher wattage. ?
Re: 25 volts and output wattage

 

The PA connector can take 25 volts, but you must have a bigger heatsink.
Re: JT65 on the BitX

 

I have done a few modes to get usb and i was monitoring last night and was able to transmit 20+ watts but i haven't hooked up my digibox yet i will put it together tonight


On Fri, Mar 31, 2017 at 9:55 PM, Ed, K5TX <k5txradio@...> wrote:

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
Re: 25 volts and output wattage

Simon Thompson
 

To which power connector does one apply 24 volts if one wants to try to boost power?

On Fri, Mar 31, 2017 at 6:51 PM Steve Greer <km4ous@...> wrote:
I'm at 24 volts with a larger heatsink and a fan and i'm seeing 20 -25 before it distorts on the scope.

On Fri, Mar 31, 2017 at 9:31 PM, Tim - K7PTM <tamccain@...> wrote:

For those of you that are running 25 volts on the PA, what kind of wattage are you seeing?? I switched mine over to 25 volts with a bigger heat sink and everything, but I am only seeing about 10 watts.? I am getting 7 watts with just 12 volts, so I was thinking I should be seeing quite a bit more with 25 volts than what I'm seeing. ?
JT65 on the BitX

Ed, K5TX
 

Hello -

I am interested in using a BitX on 40 meter JT65. has anyone tried it? How well does it work?

Thanks, Ed, K5TX
Re: 25 volts and output wattage

 

I'm at 24 volts with a larger heatsink and a fan and i'm seeing 20 -25 before it distorts on the scope.

On Fri, Mar 31, 2017 at 9:31 PM, Tim - K7PTM <tamccain@...> wrote:

For those of you that are running 25 volts on the PA, what kind of wattage are you seeing?? I switched mine over to 25 volts with a bigger heat sink and everything, but I am only seeing about 10 watts.? I am getting 7 watts with just 12 volts, so I was thinking I should be seeing quite a bit more with 25 volts than what I'm seeing. ?
25 volts and output wattage

 

For those of you that are running 25 volts on the PA, what kind of wattage are you seeing? ?I switched mine over to 25 volts with a bigger heat sink and everything, but I am only seeing about 10 watts. ?I am getting 7 watts with just 12 volts, so I was thinking I should be seeing quite a bit more with 25 volts than what I'm seeing. ?
Re: Tuning with Si5351 and Rotary encoders

 

Oh, OK.

The encoder still isn't responding though. Can you sanity check the code?

I'm getting tired and have started to miss brackets and semi-colons so I should probably wait until tomorrow to keep troubleshooting.

KB1VNA

Eric

LCD_VFO_Si5351_IF_Attempt_PB.ino
LCD_VFO_Si5351_IF_Attempt_PB.ino

CO7WT Si5351A New Sketch

 

Hi Guys,

Please take a look.

This sketch was made by Pavel -CO7WT-

Qrv's

73's Jc
Re: Tuning with Si5351 and Rotary encoders

Jack Purdum
 

No, dir should be defined near the top of the source file, outside of any function as:

volatile int dir;

It needs to be a volatile because it is used in the ISR that figures out which way the encoder is turning. That storage specifier ensures that a fresh copy of dir is loaded any time it is referenced. If you don't do that, an optimizing compiler like the Arduino's GNU C++ compiler, may cache the variable and it becomes out of sync when used.

Jack, W8TEE


From: Eric Torraca <eric.torraca@...>
To: [email protected]
Sent: Friday, March 31, 2017 8:48 PM
Subject: Re: [BITX20] Tuning with Si5351 and Rotary encoders

Thanks for the code Jack.?
Sorry it took so long for an update. The week kind of got away from me.
I'm still having some issues with it, but I think I'm making progress. A friend of mine who knows these things helped me sort out some compiling errors (we added short dir=0 in the beginning since it was telling me that dir?wasn't defined to scope in the loop).?
Now with some of the changes the display doesn't respond when the dial is turned. I think I know where that is in the code so I'll take a look and see if I can get it working.
73 de KB1VNA
Eric??
Re: Tuning with Si5351 and Rotary encoders

 

Thanks for the code Jack.?

Sorry it took so long for an update. The week kind of got away from me.

I'm still having some issues with it, but I think I'm making progress. A friend of mine who knows these things helped me sort out some compiling errors (we added short dir=0 in the beginning since it was telling me that dir?wasn't defined to scope in the loop).?

Now with some of the changes the display doesn't respond when the dial is turned. I think I know where that is in the code so I'll take a look and see if I can get it working.

73 de KB1VNA

Eric??
Re: Bitx qso night

 

I think we should keep looking for a more "available" frequency for a BITX40 QRP QSO night. Obviously away from the 7.200 birdie. And not restricted to below 7.200 because of our limit of 7.300, and?it's QRP low power and NVIS nature. Organized local QSO's make a bit more sense than multi state low power nets.

But it was a promising start for some BITX40 action.

What do you think?
Re: Birdie at 7199 - a surprising observation!

 

Thank you all for sharing your experiences with different drive strengths.

So far it seems that 4mA is the optimum VFO drive level for a standard Raduino (with VFO on the low side). But this based on only few radios.

Are there any other builders who would like to try this out and share the result? The more data the better.

I'd like to add this improvement to the standard Raduino sketch v1.05.

Thanks, 73, Allard PE1NWL
Re: extra surface mount component

Kitty Jack
 

Thanks Jerry.? I'll stick one back on and see if i notice anything different.? Mine was definitely chipped off after original installation.? The board still bears the fractured ends of the smd.? I received no spare smd part, but I did get the spare VFO toroid - at least that's what I think it is.

Mike, AK3F



On Fri, Mar 31, 2017 at 5:20 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Very weird.? I'd think C107 is a good idea, though not absolutely necessary.? That node is either audio going from the diode mixer over to the audio amp on receive, or audio from the mike amp into the diode mixer on transmit. ? It's possible that you get better audio quality (better high audio frequency response) without that cap.

The newer uBitx also has that same 0.1uF cap.

I'm curious if those with the SMD cap included in their bag of parts could measure the spare cap, see if it is 0.1uF.? Perhaps they think it works best without, but threw in the spare cap in case we disagree.

Also curious if Ashhar could clear this mystery up for us.

Jerry, KE7ER


On Fri, Mar 31, 2017 at 01:51 pm, Kitty Jack wrote:

You got me thinking about C107 so I checked my board. My C107 seems to be chipped off as well. Looks like a bypass cap, should I replace it?

?


Re: extra surface mount component

 

Very weird. ?I'd think C107 is a good idea, though not absolutely necessary. ?That node is either audio going from the diode mixer over to the audio amp on receive, or audio from the mike amp into the diode mixer on transmit. ? It's possible that you get better audio quality (better high audio frequency response) without that cap.

The newer uBitx also has that same 0.1uF cap.

I'm curious if those with the SMD cap included in their bag of parts could measure the spare cap, see if it is 0.1uF. ?Perhaps they think it works best without, but threw in the spare cap in case we disagree.

Also curious if Ashhar could clear this mystery up for us.

Jerry, KE7ER


On Fri, Mar 31, 2017 at 01:51 pm, Kitty Jack wrote:

You got me thinking about C107 so I checked my board. My C107 seems to be chipped off as well. Looks like a bypass cap, should I replace it?

?
Re: extra surface mount component

Kitty Jack
 

Jerry,

You got me thinking about C107 so I checked my board. My C107 seems to be chipped off as well. Looks like a bypass cap, should I replace it?

Mike
AK3F
it's used as

On Mon, Mar 27, 2017 at 10:18 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

I sent an email off to hfsigs asking about that extra SMD cap.? The answer: ?I should join the Bitx20 group and my technical queries will be solved.


On Sun, Mar 26, 2017 at 04:16 pm, Jerry Gaffke wrote:

This has been reported previously: ?/g/BITX20/topic/smd_cap/4525885

I don't remember any resolution to this issue.

Might be worth an email to ? ? hfsigs @ gmail dot com

My guess is this is a part to improve performance, but that most of us are running without it.? Likely safe to continue with checkout while this is sorted out.

I assume this part was in the bag, and not some part that got chipped off the board by rough handling during shipment.? My board had C107 chipped off.

Jerry, KE7ER

?


Re: IT is HERE!

 

Don't feel too bad, could be worse. ?Mine took two months: ??/g/BITX20/message/22442

But after a month, it's worth politely asking a postal clerk if they can track your order on their system. ?International tracking through USPS is not available on the web. ? ?Three weeks from "shipped" is about average. ?Might also check this thread: ?/g/BITX20/message/23837


On Fri, Mar 31, 2017 at 12:53 pm, jheryko wrote:

Okay, now I feel bad.? I live in Alabama. I ordered on February 27th and it was shipped on March 9th. I have not received it yet. Maybe they have something against Auburn fans.

?
Re: IT is HERE!

[email protected]
 

Check with your post office Doug.? I am not a fan of them as they seem to lose stuff all the time.


-----Original Message-----
From: jheryko via Groups.Io <jheryko@...>
To: BITX20 <[email protected]>
Sent: Fri, Mar 31, 2017 2:53 pm
Subject: Re: [BITX20] IT is HERE!

Okay, now I feel bad.? I live in Alabama. I ordered on February 27th and it was shipped on March 9th. I have not received it yet. Maybe they have something against Auburn fans.
Doug KN4BAX

On 03/31/2017 02:26 PM, davekn4ok via Groups.Io wrote:
I am excited group!? My BITX40 was ordered on March 17th and delivered on March 30th!? I think a record ship to the US.? Of course A for Alabama is first in the alphabet and football. LOL

I will start putting it together next week.

Thanks?
Dave KN4OK

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