Friday, November 30, 2007

QSL Card Printing

In the past two years, my entire QSL card was printed by QSL Printer in China. The printing quality was good in the very first beginning, however, those current batch of VR10 cards were really disappointed.
1) The cards are curled, probably due to overheat during the laminated process
2) The color not exactly the same, very dark and contrast no good

Last month, UX5UO , a QSL card printer from Ukraine sent me a promotion e-mail about his service. They offer me a sample of 1000 cards for US$22 (shipping cost only)

Without hesitation, I accepted their offer and sending them my shack photo as the QSL card front and simple text design for the back side. After three weeks, the cards arrived and I am very happy with the printing quality. They well care of my image file and edit with their professional skill.
No doubt, my next batch of card printing will go to them for sure.

9U0A & 5U5U QSL Cards

Received very nice QSL card from 9U0A and 5U5U.

Thursday, November 29, 2007

SB-200 Power Supply Board

No DX on the band, so spent sometime to upgrade some of the ham equipment. The SB-200 HV have a certain drop when load. So I decided to upgrade the board:
1) replace all capacitors to 270 uF 450V 105 degree c
2) replace all rectifier diodes to IN5408
3) all bleeding resistors from 30K to 100K ohms

It was completed and the high voltage much more stable now.

Wednesday, November 28, 2007

SB-220 with vacuum variable

I have problem with the tune cap arcing in the SB-220 and caused some damage to the components.

Recently I purchased one 5-250 pF vacuum variable from ebay and installed it for a trial. It works very good from 15M to 80M, but look like it is not working well on 10M. This problem need to be sort out when have free time.


On 27 Oct, my birthday, gave me a good memory.

I ran through an auction via the Transport Dept Private Vechicle Rigistration Mark Scheme that have my radio amateur radio callsign as the mark.

It is on my car now.