|
New to Ham Radio?
My Profile
Community
Articles
Forums
News
Reviews
Friends Remembered
Speak Out
Strays
Survey Question
Operating
Contesting
DX Cluster Spots
Propagation
Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers
Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net
|
You can
write your own review of the SEC CWD416L Morse Decoder.
|
DL5KW
|
Rating: 1/5
|
Dec 16, 2008 06:59
|
Send this review to a friend
|
|
No much use
|
Time owned: more than 12 months
|
I own two devices, both have the same incompetence.
The copper lines on the circuit boards come with a lot of holes, best to resolder them.
The powersupply IC 7805 gets too hot, add a heat sink, and/or add a resistor to the display backlight,otherwise the 7805 will be destroyed.
The device offers two modes.
In the first mode a relay is used. The relay glued every few minutes, I had to release it with a finger tip. The decoding of receiver signals did not work in this mode.
The second mode uses a IC Tone Decoder LM567.
The decoding of receiver signals is disturbed by any small noise spike. I use this mode, and replaced/added several resistors and capacitors,
so the circuit became more smooth.
Also it is highly sensitive to the frequency of the signal. (10 Hertz plus/minus precludes decoding).
The device will seldem decode signals from the receiver, only very strong signals without any disturbance.
I use it to display my own signals while transmitting, to recognize dropped charakters or words. The device decodes only electonic keyers, no manual morse keyer.
|
|
LX1LH
|
Rating: 1/5
|
Jan 20, 2007 13:34
|
Send this review to a friend
|
|
Not worth a penny
|
Time owned: 0 to 3 months
|
I bought this CW decoder for building an own portable CW decoder unit - my Telereader CD 670 start aging and I only use it as psychological help while having CW QSOs (mea culpa).
Verdict: It never decoded nice without errors - only the TTL Mode worked but did not stay stable on his frequency. Adjusted multiple times without use. Stopped working at all a few days ago - since it never delivered I did not try to revive it.
Only Bonus: It comes with a nice 4 line backlit LC-Display which is nice to read - and will now be recycled in other projects.
Why then a one and not a zero since it is such a lemon ? Well since it operated so lousy it improved my hearing without any aids and confidence quite a lot.
|
|
If you have any questions, problems, or suggestions about Reviews,
please email your Reviews Manager.
|
|
|
