[Boatanchors] Multicoupler & Pre-amp FS.

[Philip Atchley]

After too long an hiatus (3-4 years) I'm trying to get back up on HF again.

Because of the amount of transmitting gear that is being installed (vintage
1958 AM/CW transmitter & receiver as well as (hopefully) a more "modern"
SSB/CW transceiver) I need to go back to "normal" coax switches for my
antenna and rig selections (can't transmit through active couplers, pre-amps
etc).

Receiver Multicoupler:  (This is the Prototype of the schematic I posted the
other day).

This is a 1 input 4 output active receiver multicoupler (same as the circuit
I posted here).  This will allow 4 receivers to be fed simultaneously from
the same antenna.

Some features.
1.  Input Jack is a BNC connector.  Antenna (or output from preamp) connects
here.
2.  Has 4 output Jacks, 2 BNC and 2 SO-239 (PL-259) connectors for
versatility.
3.  DC input Jack.  13.6VDC at about 600MA.
4.  Usable range.  Works well from 60KHz through 30 MHz, may be usable
outside these limits, just haven't checked.
5.  Contains a 550-1600KHz BCB notch filter to eliminate IMD from nearby
strong broadcast stations.
6.  Input/Output impedance.  Low impedance of approximately 50 Ohms.
7.  Active devices are RF Power transistors that are rated conservatively
and heatsinked.  One driver and separate output transistors for each of the
4 output channels.
8.  Gain:  ~Unity.

PRICE:  Asking 65.00 which INCLUDES shipping in the USA.  The parts
including the nice metal cabinet cost nearly that much.

***NOTE***
I also have a NICE homebrewed "Control box" that contains switching for 3
antennas, 2 receivers, switchable Low Pass and High pass BCB filters,
Tunable pre-amp that tunes 10KHz to above the Tropical Broadcast band (Has
10 turn tuning Pot and LED bargraph indicating relative tuning Voltage).
ALL RF switching done via relays & all unused antennas/receivers are
grounded.  When turned off ALL antennas and receivers are grounded.

Works VERY WELL with the multicoupler above.

Asking  $80.00 which INCLUDES shipping in the USA.  Parts and cabinet cost
me nearly that much.

ALSO, DEPENDING ON WHAT YOU HAVE (and it's value), I 'may' swap either/both
of the above for a couple GOOD COAX switches or 300W antenna tuner with
Cross needle metering and one Coax switch (for rig select).  In any case, on
a non-cash deal I would still need help with shipping costs of these units.

73 from the "Beaconeers Lair".
Phil, KO6BB

In daily combat with QRM & QRN.
We may lose a battle but we'll win the war!
beaconeer@elite.net
Merced, Central California
37.18N  120.29W  CM97sh



---
avast! Antivirus: Outbound message clean.
Virus Database (VPS): 11/2/03
Tested on: 11/5/03 12:14:26 AM
avast! is copyright (c) 2000-2003 ALWIL Software.
http://www.avast.com