[Premium-Rx] WJ8651D-4 SN11 Description

[Steve Pappin via Premium-Rx]

WJ8615D-4. Here's a complete description of the radio as requested. It's on 
eBay with a fixed price but I can take it down if someone on premium-rx 
wants it: $1500.00 plus shipping.

Best Regards,
Steve

Watkins-Johnson WJ-8615D-4 sn 11 HF/VHF/UHF Receiver 2 MHz - 1100 MHz (this 
version has all the desirable options loaded): Watkins-Johnson WJ-8615D-4 
HF/VHF/UHF receiver fully optioned. It was manufactured in 1986 and it is a 
late model.  The microprocessor is a Motorola 6809. Firmware located in 2 
EPROMs defines the radios command set. The WJ-8615D-4 has additional 
shielding incorporated to reduce LO oscillator emissions and it meets 
MIL-STD-461. Operations such as scanning and stepping can be controlled by a 
master receiver over the 488 interface (not included). Some options are 
configured by plug in cards and firmware changes. This unit has firmware VER 
E.1.5 making it usable as a hand off receiver. It can be controlled by an 
8615P or 8610 controller. This radio also has the 2nd LO overload option. If 
the input signal exceeds -50 dBm and COR is active audio will be muted and 
the signal meter will go to zero. If COR is not set audio will pass even if 
the 2nd LO is overloaded. The wide IF filter selection makes this radio 
ideal for all types of signal search. AFC on this radio is very fast and 
accurate making it ideal for satellite tracking. This radio has a number of 
very nice options.


Notes:
1) This radio also has the optional internal tracking pre-selector and  2 
MHz to 1100 MHz frequency extenders.
2) The firmware is the correct version, VER E.1.5. Read about the major 
features of operation in the " Basic Operation" paragraph on the lower half 
of this page.
3) This radio will receive all common modulation types both narrow and wide 
band (FM mobile, FM Broadcast, Single Side Band, CW, etc). It spans all of 
the HF shortwave, VHF, and UHF Bands and there are no gaps.
4) Manual local tuning or remote automated searches are programmable when 
used with an external controller (not provided).
5) On this version AFC works with all bandwidths.
6) The first IF BW is 10 KHz, not 20 KHz. The filter was updated but the 
overlay was not. One picture shows the actual filters that are installed.



Features:
Frequency Range- 2 MHz to 1100 MHz, no gaps, 100 Hz increments minimum
Modes- AM, FM, CW, PLS, ISB, SSB, AGC, AFC, Master/Slave, Scan, Step, 
Printer, Signal Monitor Output
Side Band Filters: The SSB, USB, LSB, and ISB filters are 2.85 KHz and the 
roofing filter is 10 KHz (perfect for HF SSB)

Antenna Switch- No, 1 fixed input

IF Bandwidths Installed- 10 KHz, 100 KHz, 500 KHz, 1 MHz, 4 MHz (2.85 KHz 
for side band operation)

Tuning Rates- variable
COR / Squelch- variable from 0 to 80, and memory lock outs
Dwell- Adjustable Step / Scan rate or delay up to ~200 channels per second 
with external controller (see SSL external controller not included)

Memories- 150 independently user configurable memories in any combination or 
74 segment setups (see SSL)

Manual Gain- Audio and RF/IF
Front Panel Jacks- Phones
Rear Panel Audio-  up to 200 mW into 600 Ohms, BNC, output adjusted by rear 
panel pot
Antenna Jacks- One female N connector
Rear Panel BNC jacks- Ext Ref, SW IF, FM MON, SW VIDEO, WBO IF, COR, USB 
audio, LSB audio
Auxiliary Connectors- J13 DB-15, SM 21.4 MHz, Printer, Audio, data, hand 
off, and J14 Aux
Remote Control- IEEE 488 interface for external computer control, address 
set by internal DIP switch or programmed by front panel

Power- IEC 320 connector, 120 or 220 VAC switch selectable, 40 to 440 Hz

Option Tag / Options Installed- HFE, PRE, FE, 5 IF, WBO, 488, ISB, SSL, 2OL

HFE / FE: Frequency Extender, 2 MHz to 1100 MHz
WBO: Wide Band IF Output,  6 - 8 MHz depending on selected IF BW, Center 
Frequency 21.4 MHz
488: IEEE 488 Computer Interface
MS: Master / Slave allows front panel controls of a master receiver to 
control slave receivers, hand off, etc (see manual for requirements and 
compatibility SSL).


Basic Operation: The 8615D-4 is a compact automated surveillance receiver 
that was design by Watkins-Johnson to intercept all types of radio traffic. 
This D-4 version represents a configuration called SSL (Scan Step Lockout). 
The operator can choose manual operations from the front panel or 
automatically search for signals by using a remote controller such as an 
8615P radio or 8610 controller. Stepping is a feature that allows the radio 
to scan preset frequencies that the operator places in memory. Scanning is a 
feature that allows the radio to sweep a preset range of frequencies. All of 
the modulation modes and IF bandwidths can be configured in any combination. 
The COR / Squelch functions allow the operator to decide when the radio 
responds to an active signal and decode the audio signal. AFC (automatic 
frequency control) when selected allows the radio to track a moving signal 
or lock on the center of a signal that is off frequency. During programmed 
searches or manual sweeps this feature can help locate signals that are 
periodic or weak. The wide selection of IF bandwidths and modulation types 
allows listening to all common types of transmission including data types. 
The LED tuning bar indicates approximate center frequency tuning. A phone 
jack and volume knob are provided for private listening. The rear panel has 
a number of jacks that allow the radio to be connected to decoders, audio 
devices, computers, printers, other radios. This radio was designed to 
directly connect to the WJ SM-9205 and SM-9206 half rack signal monitors. If 
you want to know more about this radio please register on the PCS Associates 
WEB site and download the manuals.



Repair History: This receiver is fully restored. The critical tantalum 
capacitors have been replaced and the radio has been aligned. There is a 1 
year warranty. The tuning knob, headphone knob, and tuning encoder have been 
replaced.

Alignments Performed- Reference, A/D, AGC, AFC, COR, AM / FM / CW / SSB 
demodulator, uP Power Fail Adjust, Verified DC operating voltages.
Condition: This receiver is working perfectly. I would rate it cosmetically 
as a 9 on a scale of 1 to 10. There are signs of age, keys are normal color, 
minor scratches, no front panel oxidation. It is in overall excellent 
condition. The 488 interface receives commands and passes data. The firmware 
is version E.1.5.
Accessories: A new line cord has been provided. The supplied CD contains a 
copy of the 8615D and S1 manuals.
Note: Forced air cooling is not required for this type of receiver. The 
receiver has an internal low noise cooling fan fitted for office 
applications. 


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