10/16/08 a work party of WA1ZHM, N1FGY,
KJ1K and KE3HT went up Greylock and installed 3 new power supplies. The
146.91 received a dual redundant Durracom RM5012 supply with a RMBC
battery backup option. 222.1 and 449.425 each received a Durracom
RM4012 just like the one we have had on 6meters for a few years. The
operation took 2 hours and was 100% successful.
Here is a
measurement of power taken By
KC1EB and KJ1K in Feb 5th 2003 at 6pm.
3/06/2006 measured the power usage of the new 91 repeater. On receive
it uses less than 300ma. At full power (40watts out) the repeater uses
17amps DC.
4/18/06 I hear that 6m may convert to
switching
power supply. They currently use the GE boat anchor.
4/26/06 6m installed a switching power supply. IDLE power dropped from
72 watts (141 VA and P. F .51) to 18 watts (21 VA and P. F. 88 ).
The key- down power with the old supply was 293 watts( 358 VA at a
power factor of .81) and the key-down power drawn with the new power
supply 246 watts( 247 VA with a power factor of .99). So most of the
time we will see a
75% savings in 6 meter electricity!
17% savings during keydown. Keydown is relitiviy minor amount of time
compared to IDLE time. WOW!
BATTERIES:
Here is a spec sheet on the 6 batteries we have up there.
TYCO Round Cell this pdf is BIG, sorry. Here
is the
Product Manual.
4/15/06 KE3HT, K1HZL, WA1ZHM report of trip to Greylock;
We then searched for an found the batteries. There are 6 batteries made
by TYCO it looks like. They have clear sides and the plates look
amazingly clean. There
was a hygrometer there but with out cleaning materials I did not want
to get contaminated. The approximate sizes are 2 foot high by about
18inches in diameter. I am going to do some research to figure out
their
capacity but it is LARGE! Each one of these batteries could have the
capacity of about 10 or 20 car batteries. I am going to try to find
more info on these batteries.
The distribution system seems almost complete and uses some very LARGE
guage cables. It has points for a number of high current fuses in
seperate circuits. I have brought two of the most confusing fuses down
to be evaluated by WA2AAU and K1JAW so see if we can tell how they
should be set up.