Irme mizar 70 - UK Vintage Radio Repair and Restoration Discussion Forum

mogmaner · 23rd Oct 2022, 3:39 pm

Can anyone point me to where a manual could be found for this Italian marine radio. The TX has 3 6GW6 valves with transistor inverter and modulation , RX has 2 12v car radio valves OC73/45 transistor,

joebog1 · 23rd Oct 2022, 10:49 pm

What a beautifully made thing!!!. I can see why you need a circuit.

Joe

Herald1360 · 24th Oct 2022, 12:41 am

It looks a little bit "got at". There seem to be a clutch of later electrolytic capacitors and those "fuse wire?" anode top cap connections may be useful protection but don't "fit" with the construction standard of the rest of the set.

6GW6 seems to be a "sweep toob" or TV line output valve often used as RF PA in cost conscious moderate power TX designs.

There's a nice collection of earlyish high power stud mount Ge(?) power transistors on the rear panel.

ex seismic · 24th Oct 2022, 8:41 am

Is that a WS19 power supply rotary relay I see in the first picture?

G3VKM_Roger · 24th Oct 2022, 10:12 am

Quote:

Originally Posted by mogmaner

Can anyone point me to where a manual could be found for this Italian marine radio. The TX has 3 6GW6 valves with transistor inverter and modulation , RX has 2 12v car radio valves OC73/45 transistor,

Hi,

I did a Google search for this receiver and wonder if you've considered this forum:-

http://crosem.altervista.org/forum/viewtopic.php?t=1011

It's all in Italian of course but with Google Translate you could make a request for help? I've had good results with similar sites in France, including the loan of a manual to copy.

Cheers

Roger

Station X · 24th Oct 2022, 1:45 pm

That's a rather nice looking and well constructed set.

mogmaner · 26th Oct 2022, 8:06 am

Thanks for the information on the Italian site will try there, as for the relay you could be right in WS19, this switches the 24v supply to the HT power stage. Hope to use the set on 160m and 80m when finished.

23rd Oct 2022, 3:39 pm	#1
mogmaner Triode Join Date: Mar 2015 Location: Nottingham, Notts. UK. Posts: 19	Irme mizar 70 Can anyone point me to where a manual could be found for this Italian marine radio. The TX has 3 6GW6 valves with transistor inverter and modulation , RX has 2 12v car radio valves OC73/45 transistor, Attached Thumbnails

23rd Oct 2022, 10:49 pm	#2
joebog1 Banned Join Date: Jun 2015 Location: Mareeba, North Queensland, Australia Posts: 2,704	Re: Irme mizar 70 What a beautifully made thing!!!. I can see why you need a circuit. Joe

24th Oct 2022, 12:41 am	#3
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,536	Re: Irme mizar 70 It looks a little bit "got at". There seem to be a clutch of later electrolytic capacitors and those "fuse wire?" anode top cap connections may be useful protection but don't "fit" with the construction standard of the rest of the set. 6GW6 seems to be a "sweep toob" or TV line output valve often used as RF PA in cost conscious moderate power TX designs. There's a nice collection of earlyish high power stud mount Ge(?) power transistors on the rear panel. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

24th Oct 2022, 8:41 am	#4
ex seismic Heptode Join Date: Sep 2009 Location: Tonbridge, Kent, UK. Posts: 687	Re: Irme mizar 70 Is that a WS19 power supply rotary relay I see in the first picture?

24th Oct 2022, 1:45 pm	#6
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Irme mizar 70 That's a rather nice looking and well constructed set. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

26th Oct 2022, 8:06 am	#7
mogmaner Triode Join Date: Mar 2015 Location: Nottingham, Notts. UK. Posts: 19	Re: Irme mizar 70 Thanks for the information on the Italian site will try there, as for the relay you could be right in WS19, this switches the 24v supply to the HT power stage. Hope to use the set on 160m and 80m when finished.