BATC Forum

Two items now listed over on Junksale, complete with a couple of pictures:

1. SR-Systems DATV encoder, 23 cm modulator with DB6NT LPF
http://www.junksale.co.uk/view-item/8673
DATV TX NOW SOLD
This Digital ATV (DATV) transmitter is constructed from SR-Systems modules:

http://sr-systems.de/content.php?show=P ... &style=std

- MPEG2-Encoder
- DVB-MiniMod (23cm)
- Front Panel (LCD + buttons)
- L Band Low Pass Filter (DB6NT MKU 13 LPF - SMA)

The boards are already integrated and mounted in a case with front panel buttons and LCD display etc. (see picture). A suitable 23 cm power amplifier will be required for on air use, as this item acts as an exciter/modulator. Just add video (CVBS or Y/C), audio and 12 V for 23 cm DATV.

All documentation can be downloaded directly from the SR-Systems web site:

http://sr-systems.de/content.php?show=D ... &style=std


2. DB6NT 9 cm FM ATV module (MKU ATV 34 TV2)
http://www.junksale.co.uk/view-item/8671

DB6NT ATV 9cm Transmitter Module (3400 - 3475 MHz)

Using this module together with baseband video input, a high performence 3.4 GHz ATV transmitter can be constructed. By using the MKU PA 341 A amplifier, the power of the 9 cm transmitter can be increased to more than 4 Watts. By mounting the MKU ATV 34 TV2 directly at the antenna, cable loss can be reduced. You only need the baseband video (inc. audio) signal and the +12 V supply. Tuning is performed by a voltage (around 5 V DC) that controls a varicap diode in a coaxial DRO oscillator. An output SMC connector for an external PLL is provided.

MKU ATV 34 TV2

Frequency range: 3400 - 3475 MHz
Output power: Typically 200 mW
Supply voltage: +12 - 14 V DC
Current consumption: Typically 200 mA
Input connector: SMC - female (baseband video and audio)
Output connector: SMA - female
Dimensions: 30 x 37 x 111 mm
Case: German Silver

Vy 73 de Darren
G7LWT

Also listed on junksale:

uWAVE PA NOW SOLD

http://www.junksale.co.uk/view-item/8697

Down East Microwave 8 Watt, 10.0 to 10.5 GHz Linear Amplifier
As new (unused but dusty from storage)

Specifications

Frequency range: 10.2 – 10.4 GHz.
Power Out: 8 Watts nominal (6 dB minimum gain)
Power Input: for rated power out: 2.0Watt Maximum for linear operation
Return Loss: >10dB @ 10.368 GHz
DC requirements: 13.8 volts DC@ 5amps. for nominal output
15 volts DC absolute maximum
Connectors: SMA (F) only
Size: 3.5\" L x 3.0\" W x 3\" H
Active devices: NEZ 1011-3E
Keying Option: PTT – L (Ground on transmit)

The Down East Microwave Inc. 3-8PA linear amplifier is a simple gain block amplifier for the amateur 3 cm band. The unit is provided with an internal negative bias supply and keying circuit for ease of operation. The PTT circuit is toggled to Ground to activate (PTT-L).

This version is without a heat sink (3-8PAP) and is available for installations on a larger heat sink or large enclosure installation where adequate heat sinking is available. It is advisable but not necessary to use circulators and band pass filters when available. This will prevent stray oscillations and needless waste of power by amplifying local oscillator frequencies or generating high power out of band spurious signals.

The 3-8PA’s output power will compress between 8 and 10 watts with 1.5 –2.0 watts of drive. All units are tested for a minimum of 8 watts compressed output power and optimized for maximum gain before compression occurs. 1 watt of drive may produce as much as 5-6 watts of output power with this type of optimisation.

More pictures and data here:

http://www.downeastmicrowave.com/PDF/3-8pa.pdf

Please contact me regarding shipping/collection/payment.

73 de Darren
G7LWT