N5HYD 444.900 Maintenance

						The Big Bend Amateur Radio Club
						Serving the Big Bend area of west Texas.

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N5HYD 444.900 McDonald Observatory Maintenance:

11 June 2007
Repair Trip
N5HYD

PHONE PATCH :
- No dialtone again. A. C. plug mounted phone line protector showing open circuit. Link Comm Phone Patch equipment unaffected. Replaced with APC unit.

01 Jun 2007
Upgrade Trip
N5HYD

SITE:
- Upgrade to install RLC Analog Delay Modules.
CONTROLLER:
- Added RLC-ADM modules to Ports #1, #2 and #3.
PORT #2 LINK RADIO:
- Turned on radio"Monitor" button.
PORT #3 LINK RADIO:
- Turned on radio "Monitor" button. Radio PL follows COR though. Left in Monitor.

30 May 2007
Repair Trip
N5HYD

PHONE PATCH :
- Ma-Bell's surge arrestors fried. Wall biscuit blown open. A. C. plug mounted phone line protector destroyed. Link Comm Phone Patch equipment unaffected.
- Ma-Bell fixed their stuff. I replaced the wall biscuit and the line protector.

28 April 2007
Upgrade Trip
N5HYD

PORT #3 LINK RADIO:
- Installed Larsen 5 element beam, model # YA-2-450-PL, Serial #12027.

12 February 2006
Upgrade Trip
N5HYD

PORT #2 LINK RADIO:
- Moved Link Radio beam antenna from taller tower to pole mounted next the the new building.
- Installed wiring and hooked up Autopatch to phone line.

05 November 2005
Upgrade Trip
KD5KBU - N5HYD

LOCAL REPEATER:
- Site owners requested that we move the Local Repeater antenna from the short tower to the taller tower prior to dismantling the short tower. Did same.
- Replaced 9913 coax with LMR-400.

20 June 2005
Maintenance Trip
N5HYD

CONTROLLER:
- Local Repeater RX COR and PL but no PTT on any ports. Commanded Controller to go to Horned Toad System and everything came up.
PHONE PATCH:
- Telephone line protector open. Replaced 2 open 22 ohm resistors.

09 April 2005
Upgrade Trip
N5HYD

CONTROLLER:
- Changed Deemphasis caps from 0.1 uF to 0.22 uF.

25 March 2005
Upgrade Trip
N5HYD

Port #3 LINK RADIO:
- Installed Vertex FTL-7011 #3I250347 on 442.600 MHZ to talk to the WTC repeater at Notrees.
- Good TX to Notrees. Noisy RX. Not desense.
- Left unit with "A" key on (10 watts.)
CONTROLLER:
- Downloaded latest parameters.

12 March 2005
Repair Trip
N5HYD

LOCAL REPEATER:
- Constant PL indicator. A mouse had set up house next to the Squelch Card and had whizzed all over behind the Control Card. Cleaned up the mess and left mouse poison.

19 June 2004
Upgrade Trip
N5HYD

CONTROLLER:
- Installed new RLC-PATCH Autopatch.

10 April 2004
Upgrade Trip
N5HYD

Port #3 LINK RADIO:
- No path to other site so removed this radio.

09 April 2004
Upgrade Trip
N5HYD

CONTROLLER:
- Installed jumper J7, Receiver #1 (Micor) is discriminator audio.
444.900 LOCAL REPEATER:
- Replaced receiver IF and Audio boards.
- -135 db, 35 watts into duplexers.
PORT #2 LINK RADIO:
- -125 db on, -126 db off, 7.0 watts into radio.
PORT #3 LINK RADIO:
- Changed frequency from 443.000 to 420.300 to lessen intermod.
- -124 db on, -125 db off, 32 watts hi, 3.3 watts low into radio.

28 March 2004
Upgrade Trip
N5HYD

SITE:
- Swept antenna systems.
444.900 LOCAL REPEATER:
- Installed PolyPhaser.
- RLC-4 Deemphasis jumper wrong. Still is.
PORT #2 LINK RADIO:
- Installed PolyPhaser.
PORT #3 LINK RADIO:
- Installed 6 element beam on north tower, LMR-400 coax, and PolyPhaser.

27 March 2004
Upgrade Trip
N5HYD

SITE:
- Major lightning damage.
444.900 LOCAL REPEATER:
- Replaced Tripler between Exciter and "Low Level Amp Output" BNC.
PORT #2 LINK RADIO:
- Vertex FTL-7011 CPU toast. Replaced Link Radio with Motorola SM50.
PORT #3 LINK RADIO:
- Added Vertex VX-3000U Link Radio for access to BBARC.
CONTROLLER:
- Installed RLC-4 #1411 to add ports for new link radio.

12 March 2003
Upgrade Trip
N5HYD

444.900 LOCAL REPEATER:
- Installed ARR receiver preamp.
- Tuned duplexers.
- Increased transmit power to max.
- BEFORE CHANGES: -118 db, 48 Watts.
- AFTER CHANGES: -120 db, 60 Watts

08 December 2002
Upgrade Trip
N5HYD

444.900 LOCAL REPEATER:
- Replaced receive ICOM. The old one would not net.

06 November 2002
Upgrade Trip
N5HYD

444.900 LOCAL REPEATER:
- Replaced 82.5 CTCSS encoder reed with 146.2 encoder reed.
- Adjusted receiver squelch via the front panel control.

25 September 2002
Upgrade Trip
N5HYD

444.900 LOCAL REPEATER:
- Installed a 146.2 CTCSS decoder and 82.5 CTCSS encoder.
- Installed transistor inverter to change the CTCSS decode line to active low.
- Aligned audio.

01 September 2002
Upgrade Trip
N5HYD

447.600 LINK RADIO:
- Added Link Radio system to link this repeater with Pat's 442.600 system at Notrees near Odessa.

05 January 2002
Repair Trip
N5HYD

CONTROLLER:
- Replaced failing Zetron controller with a Link Communications RLC-1 controller.

29 November 2001
Repair Trip
N5HYD

CONTROLLER:
- Repeater TX stuck on. Angie unplugged it. I plugged it back in and it worked but no power out. Pushed on the coax pipe connection on the lower part of the two P.A. boards. Worked.
- Changed DTMF to regenerate always.
444.900 LOCAL REPEATER:
- 45 watts.

10 June 2000
Repair Trip
N5HYD

444.900 LOCAL REPEATER:
- Lightning struck. Replaced U202 and U202 in RX Audio/Squelch board.
CONTROLLER:
- Adjusted RX audio into Zetron controller to 1.0 VRMS at TP3 using R69 to adjust.

06 August 1999
Repair Trip
N5HYD

444.900 LOCAL REPEATER:
- Lightning struck. Replaced U202 (SC6709) in RX Audio/Squelch board.
CONTROLLER:
- Re-programmed all parameters in the Zetron controller.

26 March 1994
Maintenance Trip
N5HYD

CONTROLLER:
- Lowered TX audio by adjusting R129 in the controller.
444.900 LOCAL REPEATER:
- Increased power. 50 Watts, 0.4 uV 1Kc audio.

20 March 1994
Maintenance Trip
N5HYD

444.900 LOCAL REPEATER:
- Replaced xtals and set on 444.900.
- 30 Watts, 0.4 uV.

02 February 1994
Maintenance Trip
N5HYD

444.900 LOCAL REPEATER:
- 25 Watts, 0.2 refl, 0.3 uV.

16 January 1994
Install Trip
N5HYD

SITE:
- Installed in T.V. shack. Tested, disconnected awaiting permission from VLBI.
- 70 Watts, 0.5 refl. 0.3 uV.


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