Part 15 TV Transmission

[kf4rca]

Have you seen this?
https://www.ebay.com/itm/38810052615...Bk9SR4a-nojCZQ

[jhalphen]

Hi to all,
Hi KF4RCA,

Bandersen has tested this unit, 3 videos on YouTube.

1st test:
https://youtu.be/L7-Tf4rkdAE?si=xHCiMOP-xyT3PFvL

2nd test (sound problem):
https://youtu.be/u0OdxKc5yxs?si=AsZbg30Y6hwKzk0u

3rd test:
https://youtu.be/XX7iyPNWQ2s?si=hEL1Lcq0dUyEjhy6

Another unit, higher power, 2 (Chinese!) Watts is better:
https://youtu.be/GrduUgedrW8?si=eBojw6v-HN_xYUHe

Recap & good to know:
Units use China's analog TV frequency plan and channel spacing, 8MHz. USA is 6MHz.
As a result, only US Channel 10 (nearly) coincides for vision carrier & audio carrier.

For CCIR Euro countries UHF System G, the Chinese Tx is spot-on.
On VHF, China's frequency plan is different vs Euro VHF system B.
China used 8MHz wide VHF vs 7MHz in CCIR (Euro) System B.
see US & China frequency allocations in attached files.
Last photo is the 2W higher power TV Tx.

Hope this helps,

Best Regards
jhalphen
Paris/France