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IRF510- Temporary replacement?
Hi all,
I blew out the IRF510 (still not completely sure how- might have been because I was doing WSPR with 19v on the PA?) and so while I source a replacement, can anyone suggest any other transistor/fet that can be used in its place? I don't care if it puts out only a 100mw, that's okay with me- I just want to be able to transmit in any capacity. I have some NPN and PNP transistors about and am wondering if one of those would be workable. Thanks :) -- Ryan Flowers W7RLF ? ?<-- Learn how to go digital on the BITX40 |
Re: Raduino error to solve
Vince,
Many thanks, I will try with your directions. I hope this is the reason for the mistake. However the following is the final part: // Button press changes the frequency change step for 1 Hz steps
?
? if (get_button())
? {
?
? switch (radix)
? {
? ? case 1:
? ? ? radix = 10;
? ? ? break;
? ? case 10:
? ? ? radix = 100;
? ? ? break;
? ? case 100:
? ? ? radix = 1000;
? ? ? break;
? ? case 1000:
? ? ? radix = 10000;
? ? ? break;
? ? case 10000:
? ? ? radix = 100000;
? ? ? break;
? ? case 100000:
? ? ? radix = 1;
? ? ? break;
? }
? display_radix();
}
} 73 de IV3XHM, Toni |
Re: Raduino error to solve
Vince Vielhaber
Here's with line numbers.
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1 void loop () 2 { 3 // Button press changes the frequency change step for 1 Hz steps 4 if (get_button ()) 5 { Look at line 2. Compare it to your sketch. Do you have that { there? If not, add it and try uploading again. NOTE: there is another one at line 5, I'm not talking about that one. Just the one on line 2. Vince. On 06/06/2017 06:30 PM, Toni Cossio wrote:
Vince, --
Michigan VHF Corp. |
Re: Low mic gain and rf power
Vince Vielhaber
I thought I was having the same problem, but it turns out I wasn't. I use a Motorola Service Monitor for the dummy load and power meter and thought it was in dBm where it was actually in watts. I thought 14.1 dbm, that sucks. But it was really 14.1 watts.
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Anyway, while I was troubleshooting I was able to confirm the same RF levels (plus/minus a bit) except, of course, the output level was a lot more. Moving to the AF levels, I didn't measure past the mic. At the mic connector I'm getting around 3Vpp or more with the mic that's included in the kit. So you may want to start with the mic circuit. BTW, that 3Vpp was me just saying HELLOOOOOOOOOOOOOOO into the mic as measured on a Tektronix 2430A scope. Vince. On 06/06/2017 06:13 PM, ekelley wrote:
I have the same problem with 2 of my Bitx40's. --
Michigan VHF Corp. |
Re: No sound
Matt Patterson
Did this and still it even a hint of sound. Tried a different speaker too that I know works. Frustrating....
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At this point I'm going chalk it up to lesson learned. I thought this would be a fun build but it's turned into another headache that I don't need right. 73 Matt W5LL Sent from my iPhone 7 On Jun 6, 2017, at 5:39 AM, Raj vu2zap <rajendrakumargg@...> wrote: |
Re: Raduino error to solve
richard kappler
Nope, my mistake, need to stop reading code with the flu, parents are fine, curly braces are not. On Jun 6, 2017 6:34 PM, "richard kappler" <richkappler@...> wrote:
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Re: Raduino error to solve
richard kappler
And now that I look at it, an extra closing parentheses as well On Jun 6, 2017 6:33 PM, "richard kappler" <richkappler@...> wrote:
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Re: Raduino error to solve
richard kappler
Look at your curly braces. { You only have one and it's in the wrong place (open in the close position). You need 2. { Code goes here } 73, Richard W2KAP? On Jun 6, 2017 6:30 PM, "Toni Cossio" <a.cossio@...> wrote: Vince, |
Re: Low mic gain and rf power
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Hello everybody. |
300Km with a bicycle and my Bitx40
Julien NICOLAS
Hi,
Two months ago I did a small trip of 300km in French mountains with my bicycle, bitx40, a chromebook and my fishing pole. If you want to read more (ans see picts) : (Sorry, it's written in french, but you can use google translate) It's one aspect of the QRP fun ! Julien, F4HVX |
Re: Raduino error to solve
Vince Vielhaber
If this is a copy/paste, you have a curly bracket missing. It should look like this:
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void loop () { // Button press changes the frequency change step for 1 Hz steps if (get_button ()) { Note the open bracket under void. Vince. On 06/06/2017 05:54 PM, Toni Cossio wrote:
*/Void loop () --
Michigan VHF Corp. |
Re: Dhl customs cost to the usa
Steve Black
¿ªÔÆÌåÓýThe tax structure of the European countries and the USA are very different. Much of Europe collects duties for non European purchases. I have made hundreds of off shore purchases without paying any import tax. You have to chose between taxes and big government or the opposite. Oh and companied that.act as tax collecters for profit. Steve kb1chu Sent from my Smart Phone I said I'd never get. -------- Original message -------- From: Vince Vielhaber <vev@...> Date: 6/6/17 2:13 PM (GMT-04:00) To: [email protected] Subject: Re: [BITX20] Dhl customs cost to the usa I got mine about a week or so ago, shipped to the US.? I selected DHL since I've used them for many other imports.? There was no customs fee. What I paid hfsigs is all I paid - the $59 + $10 for DHL. Vince. > For my first BITX40 with India post to Sweden there where no custom cost. > > For my second BITX40 ??I used ??DHL. > > They take 28$ as custum fee ! > > Do not use DHL if you can wait som days ! > > SM6ERS ??/Ingvar > -- ?? Michigan VHF Corp.?? http://www.nobucks.net/?? http://www.CDupe.com/ ?????????????? http://www.metalworkingfun.com |
Raduino error to solve
Dear PA3FAT,
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Re: Europe to States BitX QSO
Andy
Hi Willy,
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OK, see you tomorrow 03-04 UTC, I will call cq cw around 7032khz and after we can try SSB. Will send you mail tomorrow when I start or will spot on Cluster. Now I TX-ing WSRP to west... check conditions :) 73, Good Luck, CUL, Andy 9a3jh On Tuesday 06 June 2017 05:51 PM, Willy wrote:
Hi Andy, Thanks for reply.Lets try CW & SSB. SSB will be the real test. What frequency do your phased verticals like? I do not have my Moxon up and my inverted v is tuned for upper end of 40m (7.3MHz) but I can use it anywhere on 40. I will listen from 0300z to 0400z and watch my email or DXSUMMIT for your freq. Where would you like to operate? |
Re: Coils and caps
Craig,
The ceramic is used with the tuning pot. See the instructions at??? Step 3: Wire up the Raduino, connect the tuning pot --> solder the 0.1uF disc ceramic between the yellow and violet wires on the tuning pot. I'm still trying to figure out what the surface mount cap is for...please do let me know if you find out!? -Dan |
BITX QSO Night, Sunday, June 11, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
BITX QSO Night, Sunday, June 11, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere
Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters! To participate, call CQ BITX at 7pm 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 7pm in each time zone.? You may participate in any time zone, regardless of your location, so you may wish to call in at 6pm, 7pm and 8pm, your local time, to contact hams in adjacent time zones. 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 7pm on Sunday.? Talk to you then! |
Re: Dhl customs cost to the usa
In many countries there is an option to self-clear your packages.? Most of DHLs fee is a brokerage fee.? See this article for ways to convince DHL to allow you to self clear. ? On Jun 6, 2017 1:16 PM, "Vince Vielhaber" <vev@...> wrote:
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VU2ESE Agc circuit
Hi,
Has any one built Ashhar's agc circuit and had it work? Seems it adds at least 10k ohms between the audio out and the speaker, if I add that much resistance I get no sound out of my speaker. Maybe I don't understand where it is placed. Also in the photo it seems the exciter and collector of the 2n2222 or 2n3904 are switched relative to the schematic. Any help appreciated. I have not tried VK3YE's yet, though it seems it would add at least 4.7k Thanks, Jerry AA1OF Sent from my iPad |