?

Ken,

I did that also today and noticed no affect at all. I think the changes need to be made further up the audio chain before it gets to the amp. I just have too many irons in the fire to try anything, except I do check into a Net everyday with it.

Joel Caulkins

KB6QVI

On Nov 28, 2016, at 5:18 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

I tried the 1nf cap and 10k resistor mod on pins 1/5 and no go. Has no affect on the audio. I'll give the 220 ufd change.

73 Ken

On Sun, Nov 27, 2016 at 12:22 PM, Rahul Srivastava vu3wjm@... [BITX20] <BITX20@...> wrote:

?

Hi!

While doing these mods try a 1nf cap in series with 10k resistor between pin 1 and 5 this also helps with the audio.

73's

Rahul VU3WJM

On Sunday, 27 November 2016 10:43 PM, "Ken Chase chase8043@... [BITX20]" <BITX20@...> wrote:

?

Thanks Joel.

I removed the cap at Pin1 & 8 long ago and that helped a lot. I'll try the 470 later today.

Hope you had a good Thanksgiving.

73 Ken

On Sun, Nov 27, 2016 at 11:50 AM, Joel Caulkins caulktel@... [BITX20] <BITX20@...> wrote:

?

Hi Ken,

No I haven't had much time over the holiday with my Family being around, however, the first thing I'm going to do is change that 450mfd snubber cap on the output of the LM386 to a 220. If you remove the cap between pins 1 and 8 of the 386 chip that will lower the gain and make it sound better already, (mine was distorting real bad), then change the 450 to a 220 for less bass. Hopefully it won't go into oscillation.

Joel Caulkins

KB6QVI

On Nov 27, 2016, at 8:15 AM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

Hi Joel

Did you ever check out the caps for the bassy audio?

73 Ken

On Wed, Nov 23, 2016 at 8:30 PM, Joel Caulkins caulktel@... [BITX20] <BITX20@...> wrote:

?

Ken,

Ive noticed the same thing about the bassy audio, i was going to change some cap values to see if i could improve it. Ill let you know how it comes out.

Joel KB6QVI

On Nov 23, 2016, at 4:55 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

I've finally hooked up a 5351 to the Bitx40. In testing I noticed two things(not related to the 5351)

The audio is very 'bassy' sounding. Is there some way to improve the quality or does the BFO have to be moved slightly?

As I tune the vfo from the lower end of the band and up, the closer I get to the end of the band, signal ?strength drops. Is this due to the BPF?

73

Ken VA3ABN.

?

Hi!

While doing these mods try a 1nf cap in series with 10k resistor between pin 1 and 5 this also helps with the audio.

73's

Rahul VU3WJM

On Sunday, 27 November 2016 10:43 PM, "Ken Chase chase8043@... [BITX20]" <BITX20@...> wrote:

?

Thanks Joel.

I removed the cap at Pin1 & 8 long ago and that helped a lot. I'll try the 470 later today.

Hope you had a good Thanksgiving.

73 Ken

On Sun, Nov 27, 2016 at 11:50 AM, Joel Caulkins caulktel@... [BITX20] <BITX20@...> wrote:

?

Hi Ken,

No I haven't had much time over the holiday with my Family being around, however, the first thing I'm going to do is change that 450mfd snubber cap on the output of the LM386 to a 220. If you remove the cap between pins 1 and 8 of the 386 chip that will lower the gain and make it sound better already, (mine was distorting real bad), then change the 450 to a 220 for less bass. Hopefully it won't go into oscillation.

Joel Caulkins

KB6QVI

On Nov 27, 2016, at 8:15 AM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

Hi Joel

Did you ever check out the caps for the bassy audio?

73 Ken

On Wed, Nov 23, 2016 at 8:30 PM, Joel Caulkins caulktel@... [BITX20] <BITX20@...> wrote:

?

Ken,

Ive noticed the same thing about the bassy audio, i was going to change some cap values to see if i could improve it. Ill let you know how it comes out.

Joel KB6QVI

On Nov 23, 2016, at 4:55 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

I've finally hooked up a 5351 to the Bitx40. In testing I noticed two things(not related to the 5351)

The audio is very 'bassy' sounding. Is there some way to improve the quality or does the BFO have to be moved slightly?

As I tune the vfo from the lower end of the band and up, the closer I get to the end of the band, signal ?strength drops. Is this due to the BPF?

73

Ken VA3ABN.

?

Yes I have one.?

Sent from my iPhone

On Nov 28, 2016, at 5:05 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

Let's rule out the antenna. Do you have a signal source to fed to the antenna input? It has to be very low strenghth around 50 uvolts (S9). If you feed too strong a signal, you may overload the front end.

73 Ken

On Mon, Nov 28, 2016 at 5:02 PM, Bill Robbins wrobbins@... [BITX20] <BITX20@...> wrote:

?

Ken:

Thanks. That's the first thing I did having followed this group. I did spread a few out a little but no help.?

Bill?

Sent from my iPhone

On Nov 28, 2016, at 5:00 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

Hi Bill

Start by checking that the toroid leads are not shorting together. You can use a toothpick to gentle spread them apart.

73

Ken VA3ABN

On Mon, Nov 28, 2016 at 4:25 PM, billrobbins946@... [BITX20] <BITX20@...> wrote:

?

I decided that you guys are having so much fun that I took out #67 to give it a whirl.?

When powering up I get a very loud buzzing in the ear phones.? So, I power down, remove all external pigtails and then add them one at a time.? It seems to happened when adding the antenna to the circuit board.

Forgive me for asking here but I have little experience with the very small components.

Where to start looking??

Bill

?

ok ,iam seeing so much chatter on the new bit-x 40, how much is it and so forth

Jerry
K7ANQ
Skcc# 10843
10-10 # 76401

--------------------------------------------
On Mon, 11/14/16, Ian Gerard iank3hql@... [BITX20] <BITX20@...> wrote:

Subject: Re: [BITX20] MY BITX40 arrived - thanks!
To: "BITX20@..." <BITX20@...>
Date: Monday, November 14, 2016, 6:25 AM


?









I
just ordered my BitX 40. I was wondering if there was a
ready made enclosure kit for it? I plan on using a DDS with
it and was wondering were any mod details available yet on
that subject?
Thanks
all ?Ian K3HQL

On Monday, November
14, 2016 7:10 AM, "Baruch Atta baruchatta@...
[BITX20]" <BITX20@...> wrote:



?









My ordered
Bitx40 arrived without any damage to the box or contents.
The VFO toroid was bent over but probably due to shaking of
the box. Thanks Farhan.

Now waiting for
the enclosure.? I plan to hook it up on the bench tonight.
?
thanksJoe
W3TTT






















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?

Ken:

Thanks. That's the first thing I did having followed this group. I did spread a few out a little but no help.?

Bill?

Sent from my iPhone

On Nov 28, 2016, at 5:00 PM, Ken Chase chase8043@... [BITX20] <BITX20@...> wrote:

?

Hi Bill

Start by checking that the toroid leads are not shorting together. You can use a toothpick to gentle spread them apart.

73

Ken VA3ABN

On Mon, Nov 28, 2016 at 4:25 PM, billrobbins946@... [BITX20] <BITX20@...> wrote:

?

I decided that you guys are having so much fun that I took out #67 to give it a whirl.?

When powering up I get a very loud buzzing in the ear phones.? So, I power down, remove all external pigtails and then add them one at a time.? It seems to happened when adding the antenna to the circuit board.

Forgive me for asking here but I have little experience with the very small components.

Where to start looking??

Bill

?

I decided that you guys are having so much fun that I took out #67 to give it a whirl.?

When powering up I get a very loud buzzing in the ear phones.? So, I power down, remove all external pigtails and then add them one at a time.? It seems to happened when adding the antenna to the circuit board.

Forgive me for asking here but I have little experience with the very small components.

Where to start looking??

Bill

?

Did you add it to the red wire or black wire?