http://www.surveillance-equip.com/pet.gps.html
professional but costly.uses gps.
Search found 4 matches
- Thu Dec 04, 2003 4:44 pm
- Forum: Schematics - help and ideas
- Topic: Pet tracking device
- Replies: 4
- Views: 13276
- Mon Dec 01, 2003 6:11 pm
- Forum: Schematics - help and ideas
- Topic: Qrp Am transmitter idea with schematic
- Replies: 3
- Views: 14373
hi
Hello Radio Qrp,
Yes seen those schematics.Great site of yours!
I made poppet part15 transmitter.It uses solid state modulation but distortion figures were high.So a voltage follower was added which could suppy more current without loading the lm386 chip.Now one could have 2 watts output on peaks.
Last year I got frustuated trying various modulation transformers hehe that's why I now prefer solidstate modulator.
Very best regards from joy
Yes seen those schematics.Great site of yours!
I made poppet part15 transmitter.It uses solid state modulation but distortion figures were high.So a voltage follower was added which could suppy more current without loading the lm386 chip.Now one could have 2 watts output on peaks.
Last year I got frustuated trying various modulation transformers hehe that's why I now prefer solidstate modulator.
Very best regards from joy
R_QRP wrote:Why not try this one for SW AM QRP:
"Spam not allowed"
What do you think now?
73s de R_QRP
- Mon Dec 01, 2003 2:11 am
- Forum: Schematics - help and ideas
- Topic: Qrp Am transmitter idea with schematic
- Replies: 3
- Views: 14373
- Sun Nov 30, 2003 9:01 pm
- Forum: Schematics - help and ideas
- Topic: Qrp Am transmitter idea with schematic
- Replies: 3
- Views: 14373
Qrp Am transmitter idea with schematic
Hi all,
Great site!!!
I have come up with a low power am tx.Maximum modulation is 85%.Should be ok for a small town or village.
Schematics will be posted soon.
Very Best Regards from joy
Great site!!!
I have come up with a low power am tx.Maximum modulation is 85%.Should be ok for a small town or village.
Schematics will be posted soon.
Very Best Regards from joy