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Jitter

 

I am new to the group and just wanted to say to anyone contemplating on building this kit...don't miss out on the fun.
I paid for the kit on a Monday, received it on a Friday, and started receiving signals two hours later.
I've been licenced since 1981 (kb4gir) and haven't had a homebrew ssb rig this inexpensive and with no trouble shooting...I repeat no trouble shooting !!!
? I'm thinking of trying to figure out how to convert it to 70cm for a satellite uplink...hi hi...
Get the kit and have fun...
Re: New member intro

 

The BitX40 schematics up on hfsigs.com are probably a good place to start, adjustments for 20m would be restricted to the BPF, the transit LPF, and the VFO.
You need to decide if you are going with an analog VFO, I'd suggest using an Si5351 for both VFO and BFO as is done on the uBitx: ?
In fact, not a bad idea to just go with the uBitx schematics, has a number of improvements over the Bitx.
The SBL-1's should work fine, though it's possible that building up from torroids and diodes could work slighty better as they don't need to work at 500mhz.
The 1n4148's should probably have more drive than they get on the Bitx.
The Bat54 schottky diodes on the uBitx have lower drive requirements, same as the SBL-1's at 7dBm into 50 ohms.
?


On Fri, May 26, 2017 at 11:39 am, John wrote:
I see that there are variants of the BITX20 on the web so I wonder whether anyone can recommend a particular circuit to follow. I have a good supply of iron dust toroids, 2N3904s and 2N2222s. I have a few SBL1s recovered from old boards. Are these much better than rings of 1N4148s?
?
?

?
Re: New member intro

 

Hi John,?

Welcome. ?I'm a newer member but I wanted to say hi and that it sounds like a fun project. ?Glad to see people who like to build stuff. ?Someone with more experience with Bitx20 will likely respond eventually. ?Good luck.?

73

Jamie VA3RLF?
Re: W8TEE TFT/VFO Board from FDIM talk

 

¿ªÔÆÌåÓý

Hi Jack
I¡¯m Carlos Molina ¨C CX8ABF
?
I¡¯m interested in one board,
my address:
Carlos Molina
Carreras Nacionales 3990
12300 Montevideo ¨C Uruguay
?
73 de Carlos
?

Sent: Friday, May 26, 2017 6:10 PM
Subject: [BITX20] W8TEE TFT/VFO Board from FDIM talk
?
All:
?
Attached is the manual that will go with the TFT/VFO PCB that I am making available. I suggest that you read through it to determine if you want to build it. The manual only talks about the TFT/VFO board. The AGC, CW mode, and speech compressor will be on a separate board. I've also attached a schematic, and BOM for the board. I have a limited amount of the boards and will announce their cost after I package one up and take it to the post office to see what it costs to send it. That won't be cheap as the PO requires it to be Parcel Post rather than First Class.
?
The way I'd like to do this:
?
On Monday I will give you the cost, which will include shipping to the US. If you order more than one board, add $0.20 for each additional board. I will give you a Paypal account for the payment.
?
Please write an email to me first telling me how many boards you want and the address where to send them. If I have boards left, I will write back with "Yes", whereupon you make your payment after which I'll send the board(s). If I say "No", I'm out of boards so don't make a payment. I may reorder and, if I do, I'll post here that they're back in and we start over.
?
Read the manual and figure out if your interested. My guess is that the first board will cost $6.00.
?
72,
Jack, W8TEE
?
?
?
W8TEE TFT/VFO Board from FDIM talk

 

Jack,
Thanks for all the work You put into this project.
If shipping to Germany isn't a problem I'd like
one of the boards , and please keep me in the queue for the AGC/CW/SC board when it becomes available.

Thanks
Philipp DJ4MU
Re: W8TEE TFT/VFO Board from FDIM talk

 

Jack,

If you are happy to export to England could I order a couple of FDIM?boards please?

73

Carl M0ICR

?
Re: Source of LDR required.

 

As far as LDR's are concerned, use the same value in ohms in the same size.

At 27-05-2017, you wrote:
I am trying to get the parts together for the VK3YE AGC, and I am having trouble sourcing the LDR,
does anyone have the details of a supplier that is suitable, or can I use any LDR ?

Thanks

Phil - G7BZD
Re: W8TEE TFT/VFO Board from FDIM talk

Adrian
 

I am interested in a board if possible

Adrian
Source of LDR required.

philip yates
 

I am trying to get the parts together for the VK3YE AGC, and I am having trouble sourcing the LDR,
does anyone have the details of a supplier that is suitable, or can I use any ?LDR ?

Thanks

Phil - G7BZD
Re: Raduino_v1.13 with scan function released

OZ9AEW
 

maybe I am a little bit sleepy in this moment !
about running out off space is one of the reason I modify your code so only keep what I want to use :-)
Re: Raduino_v1.13 with scan function released

 

I can't see what's wrong here.
The "factory" setting for both VFO A and VFO B is LSB mode (0).

73 Allard PE1NWL

On Sat, May 27, 2017 14:03, OZ9AEW wrote:
I think there is something wrong here??:??

?? EEPROM.put(24, 0); // mode A (LSB)
?? delay(10);
?? EEPROM.put(25, 0); // mode B (LSB)
?? delay(10);

line 1323 to line 1326
Re: Raduino_v1.13 with scan function released

 

Michael,

yes BFO control by SI5351 is still on my list!

But first I want to concentrate on the basic version and make sure that
all features work properly with 5Mhz VFO (raduino_v1.xx)
Then, once raduino_v1 is more or less finalized, I want to adapt the
software for 19 MHz VFO and BFO control by SI5351 (raduino_v2.xx)

Ideally v2 should be one universal version that supports both analaog BFO
as well as digital BFO (without having to manually edit the code). But we
are nearly running out of program space, so I'm not sure if that will be
possible. If not we may need to use #ifdef compiler control or maintain
versions v1 and v2 as seperate branches.

73 Allard PE1NWL

On Sat, May 27, 2017 13:38, OZ9AEW wrote:
Allard PE1NWL
the software you made have ( nearly ) everything needed and even more then
I needed !
do dought that I want BFO controlled bye the SI5351 and 19 MHz instead of
5 MHz !
but at the same time....... if it is posebly to avoid Menu's it will be my
style !
Bleep's and save_freq is not what I want, but it is easy to remove
unwanted feature
Re: Raduino_v1.13 with scan function released

OZ9AEW
 

I think there is something wrong here?:?

? EEPROM.put(24, 0); // mode A (LSB)
? delay(10);
? EEPROM.put(25, 0); // mode B (LSB)
? delay(10);

line 1323 to line 1326
Re: Raduino_v1.13 with scan function released

OZ9AEW
 

Allard PE1NWL
the software you made have ( nearly ) everything needed and even more then I needed !
do dought that I want BFO controlled bye the SI5351 and 19 MHz instead of 5 MHz !
but at the same time....... if it is posebly to avoid Menu's it will be my style !
Bleep's and save_freq is not what I want, but it is easy to remove unwanted feature
Re: W8TEE TFT/VFO Board from FDIM talk

 

I would like 2 boards also.

Thanks,
Lou? W2ROW
Re: Raduino_v1.13 with scan function released

 

Wow that looks impressive Jack!

I haven't studied the manual yet (just looked through it briefly) but as I
understand it involves quite a few hardware mods.
Will your new code also still work on a standard unmodified BITX40 board?
Or is it a dedicated sketch for your mods?

73 Allard PE1NWL

On Sat, May 27, 2017 05:14, Jack Purdum via Groups.Io wrote:
Allard:
The mods I did, as described in the manual I sent out earlier today, does
use a rotary encoder for tuning and other functions. I will be releasing
that code next week.
Jack, W8TEE
Re: W8TEE TFT/VFO Board from FDIM talk

 

Jack,
hope this not late I'd like to reserve 3 boards, if I may...

73's KC5DZH Rodney Whitfield?
Re: Step by step raduino software install instructions

 

the web page given by bob comes up in a funny language . Jap or chinese

terry gm4dso
Re: BITX40

Joe Puma
 

¿ªÔÆÌåÓý

Yes I wasn't too worried. The best part of this radio is the wealth of information on mods and support from the online ham community. You really have to start from the Internet when working with this radio and gather all the information you're interested in before you start tinkering.?


Sent from my iPhone

On May 26, 2017, at 11:15 PM, philip yates <phil@...> wrote:

Documentation is all on the website, think it cuts down on weight for carriage.

Easy enough to print it off.

Phil - G7BZD

On Fri, May 26, 2017 at 11:15 PM, Joe Puma <kd2nfc@...> wrote:
I didn't seem to get any documentation with mine. So I had to make do by going to the website while I was building and I also have some friends in IRC on the ##rtlsdr channel


Sent from my iPhone

> On May 26, 2017, at 5:28 PM, Vince Vielhaber <vev@...> wrote:
>
>
> I'm about to order a BITX40 from HF Signals.? Does it come with the documentation (schematic, parts layout, etc) or is it available for download somewhere?? I looked in the Files section but there doesn't seem to be anything recent enough.
>
> Thanks!
> Vince.
> --
>? Michigan VHF Corp.? ?? ?
>? ? ? ? ? ? ? ? ? ? ? ? ?
>
>
>
Re: W8TEE TFT/VFO Board from FDIM talk

 

Jack
? I would like 2 boards.
? ? ?Bob
? ? ?KD8CGH
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