Was it cheaper/better on amazon? ?How is the size?
Sent via the Samsung Galaxy Note? 4, an AT&T 4G LTE smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: Dennis Zabawa <kg4rul@...> Date: 2/27/17 21:11 (GMT-05:00) To: [email protected] Subject: Re: [BITX20] Project box I have one of those, bought through Amazon, that I am working with. ?I had custom front and back panels made by . ?They have a free, downloadable design program that is easy to use and their prices and delivery are great. ?I will post pix of the completed unit at a later time. Dennis KG4RUL
|
Miguel,
Thats a bit high for Rx mode.
Swtich on for a few minutes and check the board for warm/hot components to get the next trouble shooting clue!
At 0.98 thats almost 12 watts of heat, you will find it easily!
73, Raj vu2zap.
toggle quoted message
Show quoted text
At 28-02-2017, you wrote: Hi, i am from Chile CE3MSB, receive past week my Bitx40, yesterday assemble the kit, and start with RX some, but i see that the RX current drawn its 0.98 Amps, i consider that too high, its usual?,what are the current drawn in RX and TX? and the max and min Voltaje to use?
73??s
Miguel Villamor
CE3MSB
Chile
|
Re: No uploads - support replied
DropBox, Google Drive, Sync.com are work very well but they too have their "free" limits. They are all a little different but they do limit to one degree or another volume, uploads, downloads (etc) to or from and have a cap for their "free" services. Once you reach that cap you will have to wait a while in order to access again. I have even heard about real abusers having their "free" accounts terminated but that seems to rare. A group this size could hit that "cap" pretty quickly. There is no free ride. A service such as this is either supported through the sale of advertising or some other mechanism to "pay it's way". Hans and Ashar have been rather quiet on this subject. I will take that as to mean that they are working on it will when they have worked out several ways forward then we will hear about those options at that time. cheers, Graham ve3gtc On 2/28/2017, "John Smith via Groups.Io" <johnlinux77@...> wrote: I made that suggestion, and asked you think about how to make it work before shooting it down. And I am glad you did!
I looked in the subscription tab and found the member integration button, and found two options. Dropbox, and Google Drive. If you can put an up front message for new members, and a reminder for the not new members to to attach files from your own storage account. And move this group files to a BITX Dropbox or something, that would be great. The only sticky bit I see is broken links in the future after people delete files, or close the account.
So, is that how it would work? I haven't setup the integration, so I don't know how it works yet. But I soon will.
|
Dennis,
Thanks for reminding us of Front Panel Express. ?
I had seen their ads but ignored them as too costly for my budget. ?Now I see that price depends on many variables, but what's really cool is their layout software's quick price check. ?
I'm on my second attempt to drill, nibble, and file a front panel for an HFSigs BitX enclosure and will finish it if only because I've sunk so much - contented, actually- time into it. ?Maybe I'll give Front Panel Express a try for the next box. ?
Happy tinkering to you. ?
Regards,
Craig
w9ctw
|
Hi, i am from Chile CE3MSB, receive past week my Bitx40, yesterday assemble the kit, and start with RX some, but i see that the RX current drawn its 0.98 Amps, i consider that too high, its usual?,what are the current drawn in RX and TX? and the max and min Voltaje to use? 73?s
Miguel Villamor CE3MSB Chile
|
My bad...I read the emails out of order.
Jack, W8TEE
From: Jack Purdum via Groups.Io <econjack@...>
To: [email protected]
Sent: Tuesday, February 28, 2017 8:23 AM
Subject: Re: [BITX20] New file uploaded to [email protected]
Where is the schematic for Ion's speech processor?
Jack, W8TEE
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected]
group. File: SpeachProc_V1_TopCopper.pdf
Uploaded By:
Ion Petroianu
Description:
Cheers,
The Groups.io Team
|
Where is the schematic for Ion's speech processor?
Jack, W8TEE
Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected]
group. File: SpeachProc_V1_TopCopper.pdf
Uploaded By:
Ion Petroianu
Description:
Cheers,
The Groups.io Team
|
Re: No uploads - support replied
All:
I'm not a big believer in a free lunch. There are two theories of taxation: 1) Ability to Pay, and 2) Benefits Received. The first is the basis for our Federal income taxes. The second is basis for something like the gasoline taxes. In this case, membership to the group requires paying a small fee (i.e., the tax) to secure the benefits of membership. I find it hard to believe that there is anyone buying ham radio equipment who can't afford $1, so I think AtP is covered. I think it's obvious that being a member has benefits to the member otherwise they wouldn't waste their time on the site, so BR is also covered.
A membership fee is more difficult to manage, but not that much so. I know the mechanism Yahoo used for a restricted membership site because I use it for my own user group (e.g., SoftwareControlledHamRadio). Stating on the introduction page that membership requires an annual $1 fee isn't going to dissuade too many members...perhaps a few tire kickers, but not many. I have no problem with Admin taking a fee for managing the site.
I think every member should pay the fee. It not only solves the storage issues, it will help limit the membership to those who are actually interested in the BITX40.
Jack, W8TEE
From: Todd K7TFC <k7tfc@...>
To: [email protected]
Sent: Tuesday, February 28, 2017 1:49 AM
Subject: Re: [BITX20] No uploads - support replied
On Mon, Feb 27, 2017 at 07:37 am, Jerry KE7ER wrote: I'm perfectly fine with $1/yr, but that sort of thing will be tough to manage. ?Exactly who should pay? Anyone who uses the site. Casual browsers interested in the Bitx? Yes, or give a 24 hour "browse free" ticket.
An apt model for funding something like this would be PBS and NPR (American public-broadcasting organizations). The content is there for anyone who accesses it. There will be people who contribute and those who don't. Will there be "free riders"? Yes, there always are, but that is beside the point. On the Internet--YouTube in particular--services such as Patreon provide a way to pay at least some of the costs of producing web content. A percentage of the individuals who like the content contribute whatever they want, and that's enough. In our case, this year we need $120USD. If 4% of those subscribed to this group contributed $1, the problem would be solved. We wouldn't have to wring our hands in despair because we can't decide if we want files, photos, or attachments, in the mistaken belief we can't have them all. 73, Todd
|
|
|
|
|
|
|
|
|
|
|
|
|
Re: weak mic audio output,
Done! Added pdf files for PCB. They are 300% the size, so if you want to use them print at 1/3 size or ask for 100% pdf's and I will upload them. I added an extra header that can be shunted in case the provided microphone is used. I do not switch the power off as the current draw is about 10 mA. Link to the files is here:
Hope it helps, -- Ion VA3NOI
|
Re: weak mic audio output,
Done! Added pdf files for PCB. They are 300% the size, so if you want to use them print at 1/3 size or ask for 100% pdf's and I will upload them. I added an extra header that can be shunted in case the provided microphone is used. I do not switch the power off as the current draw is about 10 mA. Hope it helps,
--
Ion VA3NOI
|
Re: weak mic audio output,
Thanks Ion Regards Lawrence
On Tue, Feb 28, 2017 at 1:06 PM, Ion Petroianu <ion.petroianu@...> wrote: Hi Lawrence! I already installed the capacitor at the input. I use a dynamic microphone so I will install a resistor for people that will use the provided electret microphone. Check the files again in few hours. Best regards, Ion VA3NOI?
--
IonVA3NOI
|
Re: weak mic audio output,
Hi Lawrence! I already installed the capacitor at the input. I use a dynamic microphone so I will install a resistor for people that will use the provided electret microphone. Check the files again in few hours. Best regards, Ion VA3NOI? -- Ion VA3NOI
|
Re: bitx40 newbie build, if touched IRF510 switches and locks to transmit, takes 3A
I had a similar problem. My board was unstable and I fried one
IRF.
After much fiddling I found that the mini coax cable that I soldered to
the board which ended in a BNC was the problem. After I changed the
cable all problems vanished, The ground on the crimp of BNC was
bad..
I suspect the same thing. Floating ground on the output line. The heat
sink is also RF live..
73, Raj
At 28-02-2017, you wrote:
toggle quoted message
Show quoted text
It is strange.
? Perhaps the op may have to check his wiring.
? The bias mechanism used by Mr.Farhan appears general standard. .
In the absence of Tx?? (PTT) command,
? the mosFET would see a termination of 47+party of the 10K pot.
? I suppose it would work out to say 2.7K?? Under these conditions ,
a charge can't remain on its gate.
? However, One?? should prevent touching mosFETs by finger.
Again .IMHO, the permanent power?? to IRF510 and controling it by
bias supply from Tx power (while PTT is ON") is the?? standard
of the HAM designs as most of us Know.
Sarma / vu3zmv
.
On Tue, Feb 28, 2017 at 12:28 AM, Andrew Kasurak
<va2qch@...>
wrote:
- Thank you both for the feedback. Yes, when I said into transmission,
that was probably inaccurate. There is a similar sound on the speaker as
when I switch to transmit, but when I look at the output, I don't see the
RF transmission I expect. I am measuring power use for the whole thing at
once. This is all when hooked up to the dummy load (it's 51.2 ohm, not
50, but this is close enough? I built it in a metal coffee can). I have
not tried transmitting, or touching the heatsink 'transmitting'
[pseudotransmit henceforth] on the magloop (so I'm not sure if it's
different. I found this high current mode when trying to get an accurate
frequency measurement..).
- The gate (pin1) seems to be at 7--10v when it goes to pseudotransmit,
from 0v while just receiving. I'm not super sure on that one though, as
getting leads in there makes it go even without my hands nearby. For
clarification, from before, when I touched it, I was not also touching
any other part of the circuit, or plugged in devices. Nor was I using the
PTT button. Touching was also via two layers of electrical tape. I
believe the 3A draw, as the heatsink got hot quickly. Pin 1 of relay k1
goes to 0.9v at pseudotransmit. Pseudotransmit happens more frequently
once it's been triggered once, even when the device has been shut off
(may be a heat thing, or some stray capacitance memory?).
- I did grab a couple more irf510's, I've heard this usage is a bit
hard on them.
- As I follow it, the suppressor resistor you are suggesting is from
gate (pin 1 of IRF510) to ground? Is this
( for the grenade RF section. Some
of the pictures on this site do not load.) the kind of fix (1k resistor)
the one you were referring to? Would you recommend the 10k drain-gate
resistor too? In message? ?
#22548? you say 10 ohms, this seems very low to me, is this correct?
From that webpage, the 'miniboots 5W PA' also has a setup from gate to
ground, but it is a parallel of 2k7 with 10r in series with a 1n4740.
There is also the section 'Protect your MOSFET final stage' which details
a zener + 10 ohm. Is this attacking the same problem? I get the
impression it is more to limit regular usage than accidental
triggering.
- I'm going to go ahead and give the 1k gate-gnd a go while I wait for
any replies :)
- Thanks,
- Andrew (VA2QCH)
--
Regards
Sarma
?
|
Troubleshooting the Bitx40
Is there a video yet on how to troubleshoot the transmitter?
|
Raj vu2zap
Craig Wadsworth
Ion Petroianu, VA3NOI