Spectrum Comms 4m Transvertor

[G3YXZ]

Hi All
Just to let you know that I've recently acquired a second hand Spectrum Comms 4m transceiver type TRC4-10sL. Hoping to check it out soon as time permits.

25 Watts O/P for 5 Watts I/P. 12VDC input.

Hope to add 4m to my Portable activities with this kit. I know Damian and Carl are both active on the band......anyone else ?

73
Peter

[M0WZD]

I think I have a 4m transverter too, big thing it is
I have never plugged it in or anything

I hope yours worksout peter

[G3YXZ]

Hi Mark
That's good to know. If you find it some time, let me know what it is and I may be able to check it out for you. I have a power meter that works at 4m. No Signal generator anymore unfortunately.

The SC 4m transvertor I have is driven from 10m up to 5 Watts input, which is more useful than a previous Microwave Modules unit I used to use.

I need to knock up a dipole to try listening around the band on activity evenings.

73
Peter

[M0WZD]

5W in is much easier than the usual 500mW, I don't know what the reasoning is
for such a low input power.

Thats the main problem trying to get on 4/6 other Aerial's
I hope you have tolerant neighbours.

I just checked Spectrums website, nice to see they are still going strong.
I dont want to derail your thread by putting stuff up about my transverter
so I will start a new one.

[G3YXZ]

Hi Mark

Apart from a half sized G5RV or 40m dipole (whichever I can get to fit !) I won't attempt to put any more antennas outside. I enjoy Portable operation, so will confine 2m, 4m, 6m, 70cms activity this way.

I also have a simple low gain Vertical for 2m/70cms for the Club Net/HR etc.

Peter

[G3WCB]

Hi, Peter.
Any progress with your 4m transvertor? I can listen on 4m with my ICOM RX, but don't have any transmit capability or a dedicated 4m antenna. I am considering knocking up a 4m Minibeam "clone", which should only be about 1metre square. I have some fibreglass poles on order from Amazon, and hope to have a go at it next week-end.

I have also made a 2m "Moxon" square antenna from bits bought from Wickes for about 15 quid! It matches OK, but I won't know how good it is until I get it up on the roof.

Cheers,
Dave G3WCB

[G3YXZ]

Hi Dave
I've checked it out on the bench and it is only 11 Watts output for 5 watts input. Appears to be receiving OK. I took it over to Damian's in Ruislip (2 element Yagi) and we could hear beacons and telemetry on the band etc.

I'll try a realignment into the dummy load soon and see if it's just a matter of someone tweaking it. I think Carl has a Spectrum Analyser, so may ask him if I can take a look at the output spectrum.......just in case the PA has gone into spurious.

I have a wire dipole in the loft, but, like 6m, I'm receiving loads of spurious emissions from the wiring/neighbours routers etc. Will take it out portable and have a listen around the band. It sounds quite different from the days I used to listen years ago.

Cheers
Peter