Date   

Re: Nouveau 75

nm0s_qrp <ai9e_qrp@...>
 
Edited

This is a 75M transceiver.  You should not be transmitting at 8 or 9 MHz.

73 Dave NM0S


Nouveau 75

KM6KJE
 

Hi, joe I have recently built the nouveau 75 and I have installed the new board you sent me. it seems like it needs a fine tune adjustment but that's what I am writing about it's that when I use the tuner and go up in frequency I lose wattage is that normal at about 8.03 to 8.20 it reads 5 watts on the wattmeter (I am using a Dosy watt meter) when I put it at say 9 MHz I get about 3.5 watts is that normally and if not what may be wrong thanks terry KM6KJE


Re: Nouveau 75 Errata

w9ran
 

On 10/15/2019 1:15 AM, Dennis Shelton wrote:

Has anyone received an answer about the Nouveau 75 Q2's drawing being mis-oriented yet?

Looking at the schematic it certainly seems that it is.
I was waiting for David or someone to reply but I can confirm that the silk-screen is incorrect.   If you look at page 5 of the assembly manual presently on the website it now says that the flat should be oriented toward the right, rather than to the left as indicated by the silk-screen.

73, Bob W9RAN


Re: Nouveau 75 Errata

nm0s_qrp <ai9e_qrp@...>
 
Edited

There are a couple of construction details mentioned in the assembly manual that need repeating here.
1.  The main PCB transistor Q2 must be installed with its large flat face oriented toward the RIGHT side of the board.  The PCB silk screen is INCORRECT.  There are pictures posted that show the transistor installed in the opposite way, these are incorrect.

2.  The installation of the heat sink on Q11 is critical.  The hardware stackup should be screw, passing through flat washer, back of heat sink, black heat sink pad, back of transistor, lock washer, and nut.  The three legs on the heat sink should be snipped off.  Before soldering the transistor to the board, check the spacing between the heat sink and the board to make certain that the sink does not contact any of the surface mount components on the board.  Readjust the sink on the transistor if necessary.  Only then should you solder the transistor down. Finally, be certain that there is no contact between Q11 and Q12 before power up.
There have been pictures posted that show an incorrect hardware assembly.
If the incorrect assembly is used, it is possible for the screw to contact the tab of Q12.  If this happens during power-on, the circuit will be damaged, and somebody will have a bad day.

73 Dave NM0S


Re: Nouveau 75 Errata

WA0ITP
 

I always believe the schematic first. Identify the drain lead on Q2 (from data sheet).  Then, using an ohmmeter,  identify the pad on the board which is connected to C9.  The drain lead goes in that hole.  Hope this helps.
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 10/15/2019 1:22 AM, Gary Kohtala via Groups.Io wrote:

Nothing yet. The picture clearly  shows the large flat side to the left, matching the marking on the board. However the instructions explicitly say orient it to the right, opposite of the marking on the board. Very confusing. Wonder what the result if oriented the wrong way and power applied?

Best regards,

Gary, K7EK

Sent from BlueMail
On Oct 15, 2019, at 02:15, Dennis Shelton <nadie1943@...> wrote:

Has anyone received an answer about the Nouveau 75 Q2's drawing being mis-oriented yet?

Looking at the schematic it certainly seems that it is.


On 10/12/2019 11:02 AM, Gary Kohtala via Groups.Io wrote:
I ran into the same question. Seems like something to verify before turning on the power for the first time.

Best regards,

Gary, K7EK


Sent from BlueMail


Re: Nouveau 75 Errata

Gary E. Kohtala
 

Nothing yet. The picture clearly  shows the large flat side to the left, matching the marking on the board. However the instructions explicitly say orient it to the right, opposite of the marking on the board. Very confusing. Wonder what the result if oriented the wrong way and power applied?

Best regards,

Gary, K7EK

Sent from BlueMail

On Oct 15, 2019, at 02:15, Dennis Shelton <nadie1943@...> wrote:

Has anyone received an answer about the Nouveau 75 Q2's drawing being mis-oriented yet?

Looking at the schematic it certainly seems that it is.


On 10/12/2019 11:02 AM, Gary Kohtala via Groups.Io wrote:
I ran into the same question. Seems like something to verify before turning on the power for the first time.

Best regards,

Gary, K7EK


Sent from BlueMail


Re: Nouveau 75 Errata

Paul AI4EE
 

Has anyone received an answer about the Nouveau 75 Q2's drawing being mis-oriented yet?

Looking at the schematic it certainly seems that it is.


On 10/12/2019 11:02 AM, Gary Kohtala via Groups.Io wrote:
I ran into the same question. Seems like something to verify before turning on the power for the first time.

Best regards,

Gary, K7EK


Sent from BlueMail
On Oct 10, 2019, at 21:49, "Charles W. Powell via Groups.Io" <yahoo.com@groups.io target=_blank>doctorcwp=yahoo.com@groups.io> wrote:
So is the silk screen for Q2 incorrect on the board?  Looking from the front of the board, the flat side is to the LEFT.  I will wait to hear before I install it.

72,

Charles - NK8O


Bayou Jumper

bobby rolph
 

The Bayou Jumper has been sold. Thanks 73
Bobby


Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 10/16/2019 8:00pm-9:00pm #cal-reminder

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Reminder: Wednesday Evening 40 and 80 meter Nets

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Net control operators are Johnny AC0BQ or Paul N0NBD.

* NEW *  Wednesday evening DMR Voice Net will be at (Thursday) 0300 UTC (9:00PM Central Time Wednesday/)
Four States QRP has a Brandmeister DMR Talk Group (TG31654). Join us to discuss QRP, ask questions, or just ragchew. The Wednesday net is a directed net  but any other time you may use the Talk Group to chat with other QRPers.
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Re: Nouveau 75 sensitivity

Dwayne R <masterdr@...>
 

do not need very much sensitivity for the am radios.  I think what you will find out, you will need an extremely strong am signal in order for them to hear you. 
They may be a 20 db  over 9 to you,  but you will only be a s2 or s3 to them.  

Dwayne.  Ka0aam


On Oct 14, 2019 16:23, Nick Kennedy <kennnick@...> wrote:
That still sounds a little weak to me, although I'm not an AM expert.  A -73 dBm signal is S-9, so you'd think it would be pretty solid. No doubt the % modulation of the signal would come into play. It might be hard to judge the sensitivity of the rig with an unmodulated test signal.

I looked at the manuals for the K3 and for the Drake 2B and neither differentiated among different types of signals in their sensitivity specifications.

73-


Nick, WA5BDU




On Sat, Oct 12, 2019 at 4:35 PM Dave Benson <davek1swl@...> wrote:
Chas-

That's probably OK.  Typical gains for AM detectors run about -15 dB, that is, 15 dB of loss. You'll see much the same behavior reflected in Elecraft's sensitivity specs for AM reception.

- the other Dave- K1SWL




On Sat, Oct 12, 2019 at 5:25 PM WA0ITP <wa0itp@...> wrote:
Hi Chas,

I think that's abt right.  Dave will probably weigh in on the subject. 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 10/12/2019 11:37 AM, Charles W. Powell via Groups.Io wrote:
Has anyone measured the sensitivity of the Nouveau 75 receiver?  I do not have precision measuring equipment but I have an Elecraft signal generator that gives me 0 dBm, -33 dBm, -77 dBm and -107 dBm.  At -33 dBm I get a good focal signal.  At -77 dBm the signal is there but weak.  At -107 dBm there is nothing at all.  Is this is the range of what I should expect, or should I start troubleshooting the receiver?

73,

Chas - NK8O



Re: Nouveau 75 sensitivity

Nick Kennedy <kennnick@...>
 

That still sounds a little weak to me, although I'm not an AM expert.  A -73 dBm signal is S-9, so you'd think it would be pretty solid. No doubt the % modulation of the signal would come into play. It might be hard to judge the sensitivity of the rig with an unmodulated test signal.

I looked at the manuals for the K3 and for the Drake 2B and neither differentiated among different types of signals in their sensitivity specifications.

73-


Nick, WA5BDU




On Sat, Oct 12, 2019 at 4:35 PM Dave Benson <davek1swl@...> wrote:
Chas-

That's probably OK.  Typical gains for AM detectors run about -15 dB, that is, 15 dB of loss. You'll see much the same behavior reflected in Elecraft's sensitivity specs for AM reception.

- the other Dave- K1SWL




On Sat, Oct 12, 2019 at 5:25 PM WA0ITP <wa0itp@...> wrote:
Hi Chas,

I think that's abt right.  Dave will probably weigh in on the subject. 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 10/12/2019 11:37 AM, Charles W. Powell via Groups.Io wrote:
Has anyone measured the sensitivity of the Nouveau 75 receiver?  I do not have precision measuring equipment but I have an Elecraft signal generator that gives me 0 dBm, -33 dBm, -77 dBm and -107 dBm.  At -33 dBm I get a good focal signal.  At -77 dBm the signal is there but weak.  At -107 dBm there is nothing at all.  Is this is the range of what I should expect, or should I start troubleshooting the receiver?

73,

Chas - NK8O


For Sale Bayou Jumper

bobby rolph
 

GM. I am trying to clean up the shack a little bit so I want to Sale a couple of rigs that I never use much anymore. First I have a Bayou Jumper with the newer green faceplate. It also has the Super Upper board installed which adds a couple of features. I am asking $110 shipped to the lower 48 states. The rig could use a little alignment. If you are interested just email me direct at kb4qnr@... and I will send you a couple of pictures. 72/3 
Bobby


FS; Scorpian Iambic Paddle

George H. Gates
 

Item was sold.  72 George/W2BPI


Send in your score

John Lonigro
 

I hope everyone had an enjoyable Second Sunday Sprint last night. Now don't forget to record your score at qrpcontest.com.  Please do so by tomorrow so I can tabulate everything tomorrow night or early Wednesday.

Last night was the last SSS of 2019 to occur during Daylight Saving Time.  Next month, the contest will still be from 7:00-9:00pm Central time, but it will now be Central Standard Time. That translates into 0100-0300Z (Monday).

Thanks and 72,

John, AA0VE
4SQRP Contest Coordinator


4SQRP Second Sunday Sprint - Sun, 10/13/2019 #cal-notice

main@4SQRP.groups.io Calendar <noreply@...>
 

4SQRP Second Sunday Sprint

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Sunday, 13 October 2019
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(GMT-05:00) America/Chicago

Organizer:
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4SQRP Second Sunday Sprint. See http://www.4sqrp.com/4sqrpOnTheAir.php for details.


Re: FS; Scorpian Iambic Paddle

Mark Kelner
 

Hi George,
 If the key has not sold I would like to purchase it.

Thanks for reading,
Mark WG8Y

On Sunday, October 13, 2019, 2:48:39 PM EDT, George H. Gates via Groups.Io <w2bpi1@...> wrote:


Built from kit. Good condition. This is the model with larger base. Picture Available. $25 shipped.


Upcoming Event: 4SQRP Second Sunday Sprint - Sun, 10/13/2019 7:00pm-9:00pm #cal-reminder

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Description: 4SQRP Second Sunday Sprint. See http://www.4sqrp.com/4sqrpOnTheAir.php for details.


FS; Scorpian Iambic Paddle

George H. Gates
 

Built from kit. Good condition. This is the model with larger base. Picture Available. $25 shipped.


Re: Nouveau 75 sensitivity

Dave Benson
 

Chas-

That's probably OK.  Typical gains for AM detectors run about -15 dB, that is, 15 dB of loss. You'll see much the same behavior reflected in Elecraft's sensitivity specs for AM reception.

- the other Dave- K1SWL




On Sat, Oct 12, 2019 at 5:25 PM WA0ITP <wa0itp@...> wrote:
Hi Chas,

I think that's abt right.  Dave will probably weigh in on the subject. 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 10/12/2019 11:37 AM, Charles W. Powell via Groups.Io wrote:
Has anyone measured the sensitivity of the Nouveau 75 receiver?  I do not have precision measuring equipment but I have an Elecraft signal generator that gives me 0 dBm, -33 dBm, -77 dBm and -107 dBm.  At -33 dBm I get a good focal signal.  At -77 dBm the signal is there but weak.  At -107 dBm there is nothing at all.  Is this is the range of what I should expect, or should I start troubleshooting the receiver?

73,

Chas - NK8O


Re: Nouveau 75 sensitivity

WA0ITP
 

Hi Chas,

I think that's abt right.  Dave will probably weigh in on the subject. 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com
On 10/12/2019 11:37 AM, Charles W. Powell via Groups.Io wrote:

Has anyone measured the sensitivity of the Nouveau 75 receiver?  I do not have precision measuring equipment but I have an Elecraft signal generator that gives me 0 dBm, -33 dBm, -77 dBm and -107 dBm.  At -33 dBm I get a good focal signal.  At -77 dBm the signal is there but weak.  At -107 dBm there is nothing at all.  Is this is the range of what I should expect, or should I start troubleshooting the receiver?

73,

Chas - NK8O