Show us your.... transverter

[VK5ZD]

Hi Rob

Others may also care to comment on this, but I suspect your feed horn might (a) have to much gain and (b) is too close to the dish. Just looking at your photo, I'd put the gain of the feed horn in the 15-18db range which would mean you're slightly under-illuminating the dish. The phase center for the horn is going to be about 6mm inside the mouth (0.2 wavelength), which would mean it needs to be moved away from the dish to put the phase center at the focal point. This could explain why it didn't seem too directional.

73
Iain

[VK3PY]

Here's a picture of the 3.4, 5.7, 10 and 24 GHz transverters deployed in the field at VK3UHF during the recent Spring FD. All have 600mm dishes except for the 24GHz transverter which has a 300mm dish. Note the feed on the nearest dish. It's a VK2AES (VK3ES) designed cavity-backed dipole. The next dish along is for 5.7GHz. The transverter is a converted microwave link with a 5W PA added. The IF rig is my re-housed IC-202 with digital tuning added (Si570 kit by K5BCQ).

Eagle-eyed viewers might note the steel tent pegs driven into the ground through the feet of the tripods in the manner described by Lou VK3ALB. Note too the straps holding down the equipment. The mast between the 5.7 and 10 GHz transverters supports the area lighting for night ops.

Err........ the glass vessels perched atop the transverters are used for levelling the antennas at the horizon. That's my story, anyway. Chilled Sauvignon Blanc seems to work best in the warmer weather.

Chas
VK3PY

[VK4GHZ]

Err........ the glass vessels perched atop the transverters are used for levelling the antennas at the horizon. That's my story, anyway. Chilled Sauvignon Blanc seems to work best in the warmer weather.

Chas,

That looks much more effective than a stubby of TSINGTAO!

[VK5RC]

Many Thanks for the comments, esp re tying down,
Iain I will do some research re the focal point of the horn, first I have to recall which one it was,

"Just one glass of horizon detection fluid 'ocifer' really!!!!"
73s

[ZL3RC]

Puts a whole new meaning into "Spirit level"

A nice red would look good though and easier to see the level. Although that may depend on the amount left in the glass....



Roger ZL3THQ

[VK3BJM]

That looks much more effective than a stubby of TSINGTAO!

Well, they have had years of practice to get it right, Adam...

73,
Barry
VK3BJM

[VK2AVR]

I think your 'spirit' level would be more effective at levelling the operator

[VK3AUU]

It is nice to see you all getting into the right spirit at this time of the year.

Seasons greetings
David

[VK2MER]

Just a few pics of my potable set up. 1296 / 2403/ 5760. Not as flash as some.

[VK3ALB]

Just a few pics of my potable set up. 1296 / 2403/ 5760. Not as flash as some.

Can you tell us a bit about it or show us the insides? How do you find the multifeed?

[VK2MER]

First up its all thanks to Matt VK2DAG. He got me started on the microwave stuff.

Starts of with a ic 7000 If 147MHz. for 2403. or 144MHz for 2400 for 5760. All relay switched

147MHz to KUHNE MKU 23 G3 2403 MHZ. 1watt ATT to go
to
Pyro Jo Amp 27 Watts
to
Rf tri band feed.

144 MHz to KUHNE MKU 23 G3 2400 MHz
to
U source WiMax Converter 2400 MHz to 5760 from Matt VK2DAG.
to
vk5eme 1 watt amp
to
Rf Tri band feed.
Its got way to many wires to show the PROS. But it works. Hope the info helps.

No contacts on tri band feed yet.

[VK4GHZ]

Nice setup MER.

How do you find the multifeed?

Lou, you know you want one!

Sent from my Galaxy S3 via Tapatalk 2!

[VK3ALB]

Thanks Kirk,

Looks good but I'd like to hear about the Tri band feed in action especially compared against single feed systems.

Adam,

My birthday is in April which should give you plenty of time to send me one.

[VK3XDK]

Have you been a good boy lou??

[ZL3MH]

When we are aloud to go portable here is my 6+2m system.
The system is a IC202s 2m to MMT50/144 transverter and
a HB 80w 6m amp. Also switchable via a coaxal relay is
a HB 3w to 80w amp on 2m.

73 Murray ZL3MH

[ZL3MH]

HB 3w input 80w output 6m amp

73 Murray ZL3MH

[ZL3MH]

The VHF station FT101zd MK3 , FTV250 Transverter 2m
and the FTV650 6m

[ZL1UJG]

I,Havent got any images, but have a Flex1500 driving an old Yaesu FTV707 2M transverter (with tweaked RFstage). I have both the 6M and 70cm units as well, but not incorporated in the setup.
The Flex 1500 is a mite insensitive and I run a Masthead 2M LNA (an old Mutek SLNA144S inside unit) to get the gain sufficient to override the Flex1500 noise.
I might build a little IF/switching box, which could incorporate an IF amp like a MSA1104.
Anyway the FTV707 2M unit is stable enough for FSK441, and yet to have a JT65B mode contact, but its looking hopeful with ZL-VK paths being warmed up.

A few months ago ran a MMT144-28 transverter which was drifty in its original state. A new LO gave an enormous improvement and I had a JT65B QSo with that.

Kevin

[ZL3RC]

Hi Matt, I think the Bra size would be a double D and extra padding for the feeding bits in the front.

Roger ZL3THQ (When I retire I was going to take up bra fitting )

[VK3QI]

Matt,

I take it that you are using the Kuhne 47GHz transverter direct to the dish - so running 0.2 mW

I am currently putting together a 47GHz system but it has the 200mW amp which needs to be manually switched with a changeover plate.

What bits are you using for 76GHz? The label says used, whatever it is!

Regarding the dishes - I was thinking of several procom flanges back to back with M3 studs embedded in one of the flanges and some tiny knurled nuts to finger tighten, so that the dish could be detached for transportation. Alternatively a large plastic toy box (from Kmart or Target) with suitable foam inserts to support the various parts.

I'll send you a photo when I have figured it out.

Cheers

Peter VK3QI (VK3ER/p)