Extracts from 7HR/7WI log		Richard Rogers VK7RO 2002/2006

 The Hobart Radio Research Club was formed when the Tasmanian WIA headquarters
 moved to Launceston in 1925.   Their club station was 7HR.   Here are some
 extracts from their log book with a few explanatory additions.

24/8/27	Elizabeth Street   [first entry]
	RX   0 - V - 1   Inside antenna, no earth
	TX   DE5 Hartley oscillator   2 x AR Ediswans as rectifiers
   	230V 38mA   RAC   [rectified AC?  ie no filtering]   32 M [wavelength]
	Ant 96' long  40' high & counterpoise
31/8/27 "5BW is losing his usually good 'fist' as he has motor
 	bike mania"
2/9/27	"...words were broken up owing to vibration of receiver
 	coils - caused by the Tailor under the Club Rooms"
	7LJ using 700V each side of centre tap and 26 jars
   	[electrolytic rectifier?]
6/9/27	[worked] 7HL at Radio Exposition at Town Hall

[no entries 29/9/27 until 21/6/28]

21/6/28	[ex 7DX re 7HR TX]   "a long way from being correctly
	tuned as can hear closed circuit oscillator out of tune with
 	antenna counterpoise circuit"
18/7/28	8.20pm [heard] slow morse from 7DX   icw [interrupted continuous wave]
1/8/28	[from 2NS]   7HR has two distinct waves
20/8/28	[operators]   OA-3KB and OA5BY   [during WIA convention?]
8/1/29	change 7HR to 42M    [new regs from 31/12/28]
5/1/29	[working] VKX7HR on SS Toorah
4/2/29	X-VK7HR	installing portable crystal controlled transmitter
	on Toorah   on air   84M   [note the use of X... for portable work]
5/2/29	Regatta Day   9am   On the air 84M . . . Cruising up and down
 	River Derwent with Mr Sweeting of 7ZL at microphone
 	describing racing, swimming and rowing events which was being
 	received by 7ZLs short wave receiver in the city.
4/7/29	increased power slightly by short circuiting "ford" choke
26/7/29	7LJ   ". . . good to hear the billy goat again hi   R 8 - 9 note
 	pretty fair RAC wid DC"   [billy goat gruff? a comment on the
 transmitters poor note?]
2/8/29	VK7HR
3/8/29	VK7WI  [The WIA headquarters had moved back to Hobart]
7/8/29	2000 VK7WI de VK5WI

1/11/29	New room   66 Liverpool St
20/11/29adjusting VK7WI crystal and tuning  [new crystal controlled tx]
4/12/29	VK7WI de W6AM [first W QSO]
11/12/29Found slop jars dry and others low in electrolyte
	topped drys with small quantity of H2O
16/12/29TX rectifiers attended to
18/1/30	Put new juice in slops   cleaned them up a little
9/3/30	slop jars cleaned and topped up
27/1/30	de VK3PR "I heard u qso XVK3BQ...   [field day]
23/3/30	listened for XVK7WI   Field Day
28/3/30	Mr Scrivner Chief P/O Tel Canberra called in to 7WI
	steady xtal with dc note
16/4/30	Xr out of action.  No perk.  VK7WM  (later found wire off key hi wm)
25/5/30	CO seemed OK
17/6/30	slop jars overhauled   7DXs last record in log book [he died on
	26/8/31]
21/6/30	put new soda in slops

9/9/30	VJMP on the job again [C Peddell an RAAF operator?]
	Built TPTG Osram DE5 input 30 mills  9 W
	ur RAC sigs
	7HO [new broadcast station] harmonic blotting out lower band
10/9/30	lowered input 20 mills 300 V  6 watts
15/9/30	refilled & rejigged slop rectifier with power tranny   Gosh 40
 	mills think 500V
27/7/31	checked wavelength
29/8/31	Put a hedgehog & a bank of capacitors in HT+ lead & thereby
 	improved note [a hedgehog was a transformer used in telephone work]
5/10/31	de ZL3OS ...a bally ham came on...
8/12/31	Slow Morse transmission
17/1/32	RF choke open, wire corroded thru using acid flux for soldering

[RAC oscillator TX 24/8/27 to 1/11/29 32M   8/1/29 42M (new regs 31/12/28)
crystal controlled TX 1/11/29 to 9/9/30   RAC again from 9/9/30
7 entries about maintenance of electrolytic rectifiers!]