Archive for the ‘amateur radio kits’ Category

Pastime Projects Releases 1940’s Style “Companion” Power Supply

March 21, 2017

SAMSUNG CAMERA PICTURES


Pastime projects http://www.pastimeprojects.com has started production of the ‘Slat Board’ Style Power Supply that closely resembles the original style of the companion power supply shown in the ARRL Handbooks for use with the 6V6
‘Slat Board’ novice transmitter for 80 and 40 meter CW. This model uses a vacuum tube as a rectifier instead of the solid state diodes used in the other power supply available. Either model has been tested and performs very well.
Full specifications will be available on the web page. Or contact pastimeprojects(at)yahoo(dot)com for more info.

Pastime Projects “Remember When” 6V6 Transmitter Kit 40 Meter Special

February 27, 2017

PASTIME PROJECTS

“REMEMBER WHEN” 6V6 TRANSMITTER KIT

40 Meter Special Edition

Thanks to the suggestion of one of our overseas amateur radio builders, this kit has been packaged as a 40 meter Special Edition. The trend of 40 meter operation using low power cw is growing in popularity. This kit includes the three coils, plate, antenna link, and cathode coil, pre wound and packaged with the kit.
In exchange for the labor and cost to include these prefinished coils, the common 8 penny nails used for coil winding have been excluded from the kit. Also, the extra wire for winding the 80 meter coils is not included.
The coil winding form layout and winding information are, of course, still part of the provided manual. Our design includes Amish prepared oak strips and end pieces, brass screws, “sucker sticks”, and other hardware just like the original. Many of the components are new (and we think more reliable than originals) but the retro look remains.
This kit will operate on 40 meter or 80 meter CW ham radio frequencies with power out in the 2 to 5 watt (or more) range. It is crystal controlled. Change from one band to the other requires different coils be soldered in. The 40 meter version seems most popular among our builders.. The manual that comes with this kit contains step by step instructions for assembly, wiring, and soldering. The vacuum tube is included. The builder will need a crystal and power supply.
To put this kit on the air a license, antenna, and power supply will be required. The builder should be familiar with working around high voltage before applying power to this kit.

NO CHANGE IN PRICE AND SAVE A LITTLE ON SHIPPING COSTS
!

See http://www.pastimeprojects.com for more information or contact us at pastimeprojects@yahoo.com

Pastime Projects shipments out of United States

January 14, 2017
Prototype Receiver

Prototype Receiver

WE ARE SEEING DAILY ACTIVITY ON OUR WEB SITE OF POTENTIAL BUYERS WHO ARE LOCATED OUTSIDE THE UNITED STATES.  WHILE WE DO NOT HAVE ACCESS TO ANY PERSONAL INFORMATION, THE COUNTRIES OF ORIGIN ARE LISTED.  I WOULD LIKE TO ENCOURAGE YOU TO INQUIRE ABOUT YOUR INTERESTS IN OUR PRODUCTS.  WE WILL HELP YOU THROUGH THE  PURCHASING PROCEDURES.

IF PURCHASING PASTIME PROJECTS ITEMS FROM YOUR ADDRESS OUTSIDE THE UNITED STATES SIMPLY EMAIL US AT pastimeprojects(at)yahoo(dot)com AND LET US GUIDE YOU THROUGH THE STEPS. ONE EASY WAY IS TO SIMPLY ENTER YOUR ORDER THROUGH THE PAYPAL BUTTONS.  WHEN WE RECEIVE YOUR PAYMENT WE WILL CALCULATE THE ADDED POSTAGE AND SEND YOU AN INVOICE FOR THE ADDITIONAL PAYMENT.

WE WILL COMMUNICATE THROUGH EMAILS THROUGH THE  ENTIRE PROCESS.

 

 

Pastime Projects Regenerative Receiver Kit Redesign Coming

December 2, 2016

7.28.09 prod

The regenerative receiver kit is returning to the http://www.pastimeprojects.com catalogue of radio enthusiasts kits.
The design was redeveloped around the 40 meter ham band range. It receives AM foreign broadcast, cw, single side band with patience, and radio amateur AM stations. It is not recommended for use as a main receiver for radio amateur stations. Regen receivers tend to require careful tuning. They show more drift than commercial receivers.
But they are fun for beginners, short wave listeners, and experimenters. Our design now has been tested on the
3.5 MHz range, and 80 meter ham bands are being heard. The kit includes some unusual features. One is the use of
a “space charge” type tube that uses 12 volts on the plate as well as the filament. That means this receiver will be powered by your 12 volt DC power supply. The kit is somewhat difficult, but assembly, wiring,, and testing are explained in detail in the step by step manual that is included in the kit. Stay tuned for more! 73 Glenn for Pastime Projects (at) yahoo (dot) com.

SPECIAL DEAL ON 6V6 MC 80 M PASTIME PROJECTS TRANSMITTER KIT

August 9, 2016

Today we are offering a special on our pastime projects 6V6 MC 80 Kit. This kit includes a wound and tested
Output plug in coil tested on 80 meters in our shop. In addition, we will include a new 3.5795 crystal element assembled in a FT-243 or similar style vintage type crystal holder. These are assembled and tested here, both
on a communications monitor and in a completed 6V6MC 80 Kit. These crystals are performing well for us in the
lab here at Pastime Projects, especially using our QRP mode power supply at 200 volts. The crystals have been
tested at 350 VDC with good results, but we are not ready to warranty the crystals at this time. For a limited
time we will also offer free shipping within the US. Delivery may run a little longer depending on demand,
but we are starting to build stock in advance of orders. 73 best wishes Glenn Brown for http://www.pastimeprojects.com and pastimeprojects(at)yahoo(dot)com.

12K5 OSCILLATOR KIT PRICE INCREASE

June 8, 2016

After 10 years of production our little 40 meter do it yourself code practice oscillator kit faces a price increase.  We recently looked at our costs in today’s market as compared to what we paid in 2006.  The increase is effective immediately. You will still get the same pre-wound coil, a new qrp style crystal, and the detailed instruction manual we have strived to improve over the years.  While this is considered a “transmitter” kit, we very
plainly describe its communication ability as “most likely won’t be heard next door”. You kit builders know that it’s still a thrill to follow instructions and build something yourself.

Remember When QRP 40 M transmitter

Happy Building!  73 Glenn for Pastime Projects   pastimeprojects(at)yahoo(dot)com

 

 

 

 

 

 

 

Pastime Projects High Voltage Power Supplies

September 3, 2015

Pastime Projects (www.pastimeprojects.com) manufactures amateur radio kits. Two of our most favorite are the “Remember When” slat board 6V6 kit which was featured in the 1948 (and elsewhere) ARRL Amateur Radio Handbook. This simple transmitter used a 6V6 (or 6L6) vacuum tube on a chassis made of orange crate wood. It was designed for the amateur radio operator to send CW (code) on 80 or 40 meters.
Our more recent kit uses a metal chassis and an improved oscillator kit introduced in the 1960’s Handbooks. It was more stable, easier on crystals, and oscillated on 80, 40 and other bands by switching plug-in coils. Ours uses a 50 ohm link coupled output which matches today’s antennas, antenna tuners, low pass filters, and dummy loads.
These circuits, as first published, were often accompanied by a power supply design which used a 5 volt rectifier vacuum tube. We chose to use modern solid state silicon rectifiers instead. This eliminated the need for a 5 volt winding on the transformer, and the added heat, light, current demand, vacuum tube, tube socket and so
on associated with the rectifier tube.
The result is a simpler less costly power supply for you to build and enjoy. Best regards, Glenn Brown W8JZI for pastimeprojects.com

What is next at Pastime Projects?

July 5, 2015

Got an email from one of our customers wondering why we didn’t make the output on our 6V6/6L6
transmitter kit a pi-network instead of link output. Very good question! Probably one factor
in our decision was the cost of the change. Variable capacitors are expensive. The chassis size
would probably have to be larger also. But, these are not big issues. He is probably right; we
should revisit the pi-output design.
Some of the projects underway now include:
1. Regenerative receiver with tube(s) and toroid coils – Short Wave design with capability
to tune ham radio cw, am, and ssb in a rudimentary fashion. Status at this time is a prototype
6 – 10 MHz model that is very promising. Needs to be simplified for easy duplication as a kit.
Current model runs on 12 volts dc. No project completion date set.
2. Our low pass filter design converted to PCB configuration. We have the tools but not
the talent or time to complete this task. Interested in volunteering your expertise in this
very basic board design?
3. Vacuum Tube T-R switch based on vintage Handbook designs for handling our transmitter/
receiver interconnection automatically transferring from transmit to receive mode. Well underway
with this project.
4. Simple receiver design, probably solid state, to allow reception of cw along with our
transmitters..

Any ideas or suggestions? Let me know. Glenn W8JZI(at)ARRL(dot)NET or go to contact us
page of http://www.pastimeprojects.com7.28.09 prod

Power Output of the New Pastime Projects 6V6/6L6 MC Transmitter Kit

May 28, 2015
SAMSUNG CAMERA PICTURES

SAMSUNG CAMERA PICTURES

Here is more info on the power output of the little 6V6/6L6 MC Kit.

Test Frequency was 7.042 MHz with 6L6MGC (China) vacuum tube. Measured into a 50 ohm dummy load. Wattmeter used was a Oak Hills WM-2 . New prototype Pastime Projects PP PS MC Power Supply running approximately 200 VDC..(Pictured)

Under these conditions, power output was approximately 2.2 watts. (Results on 3.515 and 3.580 were about the same using an 80 meter plug in coil and 80 meter crystal) .Switching back to the 40 meter coil and crystal, we tested the kit using a Laboratory Grade regulated power supply with the following results:  200 VDC SETTING EQUALLED APPROX 2 3/4 WATTS OUTPUT.  250 VDC SETTING EQUALLED APPROX 4 3/4 WATTS, 300 VDC SETTING RESULTED IN 7 1/2 WATTS, AND  350 VDC EQUALLED 10 WATTS. (6L6MGC)

The New prototype Pastime Projects Power Supply modified  provided 9 1/4 watts output.  This modification is not available in production at this time. The results of your set up may vary from the above results.

73 Glenn Brown    www.pastimeprojects.com

Pastime Projects 6V6 Transmitter Kit Features

April 1, 2015

The new 6V6 MC Transmitter being introduced by Pastime Projects is a single tube CW (code) transmitter for use in the HF Amateur Radio Bands. The initial offering will be for 40 Meter Band operation. It is a vacuum tube kit which the buyer assembles. A complete manual is provided for those with technical ability and experience to assemble and operate. The design is based on circuits commonly used in the 1960 era of amateur radio. Some features of this project are described on the home page of the Pastime Projects Home Page found at http://www.pastimeprojects.com.

If you are interested in purchasing one of these kit when they are released, you can get on the first come, first served list by contacting pastimeprojects(at)yahoo(dot)com.  73 Glenn for Pastime Projects