On Jun 29, 2017, at 8:46 AM, 'Jim Sheldon' w0eb@... [4sqrp] <4sqrp@...> wrote:

I'm uploading a PDf file with what documentation is available from the 
Chinese on the particular little DDS VFO I bought off eBay for less than 
$40. It came with almost no information/instructions, but with a lot of 
internet searching and my own experimenting with one, I've been able to 
piece together enough information to make one work reliably. I've also 
successfully interfaced it with the SS40HT receiver and with the help of 
its original designer Jim Kortge, K8IQY, also had success with the 
SS40TX in it's originally intended transceive mode with the SS40HT/RX.

I've compiled the DDS information along with my own notes interpreting 
the Chinese English and added an appendix to the DDS instructions with 
details on how to interface it with the SS40 pair. All the information 
I have on the DDS is contained in this document and I won't be available 
to answer further questions for some time due to vacation travel - I'll 
be off the beaten path and will have very little internet access for 
much of the trip.

Hopefully the file will explain things sufficiently for those of you 
that have the SS40HT and SS40TX and want to hook up a DDS VFO in place 
of the original VXO to give a bit more tuning range without having to 
switch out the crystals in the VXO as some of you have already done.

Jim - W0EB

----- Original Message -----

From: 'Jim Sheldon' w0eb@... [4sqrp]

To: 4SQRP Mailing List

Sent: Thursday, June 29, 2017 6:46 AM

Subject: [4sqrp] Inexpensive Chinese DDS and the SS40HT/SS40TX

 

I'm uploading a PDf file with what documentation is available from the
Chinese on the particular little DDS VFO I bought off eBay for less than
$40. It came with almost no information/instructions, but with a lot of
internet searching and my own experimenting with one, I've been able to
piece together enough information to make one work reliably. I've also
successfully interfaced it with the SS40HT receiver and with the help of
its original designer Jim Kortge, K8IQY, also had success with the
SS40TX in it's originally intended transceive mode with the SS40HT/RX.

I've compiled the DDS information along with my own notes interpreting
the Chinese English and added an appendix to the DDS instructions with
details on how to interface it with the SS40 pair. All the information
I have on the DDS is contained in this document and I won't be available
to answer further questions for some time due to vacation travel - I'll
be off the beaten path and will have very little internet access for
much of the trip.

Hopefully the file will explain things sufficiently for those of you
that have the SS40HT and SS40TX and want to hook up a DDS VFO in place
of the original VXO to give a bit more tuning range without having to
switch out the crystals in the VXO as some of you have already done.

Jim - W0EB

 

Our club operates under two categories.  The 100 watt SSB stations which were using the call of our club president KK4ICU

with 3A AL.  We we were all set up at Plainview High School and adjacent Civic Center in Rainsville, Alabama, this is about 

50 miles SW of Chattanooga, TN.  

 My station, 5 Watt CW operating under the club call W4GBR  1A AL.  I set up a 280' sloping delta loop with an average elevation 

of about 40'.  It was fed with 300 Ohm twin lead to a LDG Z-11 Pro II tuner and a KX3.  My partner was Tom KC5UN, we switched 

off to give each other a break every so often which worked out well.  Calling CQ did not work out well, as usual, so we used the 

S&P method.  

Here's the QRP band-QSO breakdown:

10m - 34

15m - 43

20m - 82

40m - 110

80m - 46

           315 total contacts  

The three QRO stations had a total of just over 400 contacts.  

The highlight of the event was when we took a break for the BBQ dinner!  

I am attaching a picture of my dupe checker, Brittany KM4BRR and I.  Notice we are set up inside the shop area of the school. 

As always FD is a fun experience.  I did not have any trouble sleeping Sunday night!  

10m - 34

15m - 43

20m - 82

40m - 110

80m - 46

           315 total contacts  

The three QRO stations had a total of just over 400 contacts.  

The highlight of the event was when we took a break for the BBQ dinner!  

I am attaching a picture of my dupe checker, Brittany KM4BRR and I.  Notice we are set up inside the shop area of the school. 

As always FD is a fun experience.  I did not have any trouble sleeping Sunday night!  

----- Original Message -----

From: Wayne Dillon wayne.dillon@... [4sqrp]

To: 4sqrp@...

Sent: Wednesday, June 28, 2017 7:51 PM

Subject: [4sqrp] Tonight's 40m net

 

GE All

Checkins were:

KV6Z - Bill - OK

WA9PWP - Paul - WI

W2SH - Chas - NJ

Once again using the Vibroplex, I think it's getting better (I hope!)

Thanks all es God Bless de Wayne - NQ0RP

--

 

QRP -  EFFICIENCY AND SKILL, NOT POWER. 

 

I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17

 

http://www.4sqrp.com/index.php

NAQCC MWN NCS

NAQCC Net manager

NAQCC # 0759

Membership Chairman - 4SQRP Group

4SQRP 40m NCS
4SQRP #95

FISTS 17184

FPQRP #342 (Flying Pigs QRP Club)

G-QRP-11504

QRP-ARCI #11505
SKCC #1155T

SOC #848
30MDG#1176

NEQRP #693

GORC #192

DMC (Digital Modes Club) # 06686

Zombie# 1186

Virus-free. www.avast.com

Wayne Steury - N9EGT - is now 4S Cricket Society member #004.

Wayne has demonstrated that dedication, patience, and skill can pay big dividends in the QRPp world.

Well done Wayne, and welcome aboard.


We now have 4 states represented in the society.


73

Bill

KV6Z

Well, the "Jayhawker" (SS40 twins packaged similar to a Bayou Jumper and the VXO replaced with a cheap Chinese $35 DDS VFO) is finally operational and had it's first contact this morning with Don, WB6BEE on 7.025MHz at 12:54 UTC.  Antenna was a PAR EndFedZ 40-20-10 meter antenna up maybe 20 feet at it's highest point.  I was also copied by W6QR in Torrance, CA but I'd already signed and didn't work him.  Heard him talking to WB6BEE about my signal being 559 in Torrance though before I pulled the antenna (thunderstorms in the area again).

Jim - W0EB

 

I operated about three hours from home, 50 contacts and 33 sections, QRP CW 5 watts into my 205' center fed antenna and the new 9:1 balun, 40, 20 and 15 meters, CA, FL, NH, MAR, PA, NY, NM, WY, CO, MT, plus most of the close in states. One of my local clubs rented a house on a lake but I didn't get to go with them, still recovering from double pneumonia.
Darryl, KK5IB

The reflector seems is pretty quiet these days, especially with FD
acitvity. Did anyone work FD this year with the club call? I didn't
operate due to conflicts for my time, but I suspect that several, if
not
many, members were operating with their local clubs. So how did you
do? How was propagation in your area? How many contacts? Did you camp
or operate from home? Inquiring minds want to know.

--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com



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Posted by: WA0ITP <wa0itp@mchsi.com>
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