What CPU are you using?
With a I3 i had the same issue, on a faster I5 this buffer never reaches 100
VY73 DB8TF
What CPU are you using?
With a I3 i had the same issue, on a faster I5 this buffer never reaches 100
VY73 DB8TF
Aha, you set a "trap"..
BTW, this ring device is called "circulator"
Is this circulator really 1500-1700MHz?
Then it won't work on 2,4GHz properly.
I bought three of those directional couplers on eBay and they work very well for measuring PA output power.
The coupling value can be selected 10/20/30/40dB. (and some more)
Those directional couplers are sold by many sellers and also on amazon & Co. for a few bucks.
https://www.ebay.de/itm/1stck-…m:mT6rnKMBsPYpjotZjzsa11w
At "Antons Funkperlen" website are photos from the inside: http://funkperlen.blogspot.com…htkoppler-fur-7-euro.html
Edit: attached a picture of a measurement on my 30db coupler
VY73 DB8TF
G0MJW: for a split second
Edit: The output combiner is only rated at 105/145W and whilst the p1dB of each device is 110W I suspect it would blow up if I pushed it any harder than 80W.
Richard those MRF7S2110s are internally matched to 2,1GHz so be happy if you reach abt. 30% of the rated power on 2,4GHz. Expect 40-45W per device.
73s DB8TF
PA and BU500 now "married" and first (and only) fullpower test shows peak 12dB above CW beacon (with the WiFi barbecue dish).
VY73 DB8TF
Here is a french site where they sell surplus WCDMA amplifiers cheap(er than our friend from poland).
Could be interesting for OMs who would mod such amps for 2,4GHz themselves.
(I would buy there if i not already had 5 amps around here )
Here is another version of this AMP for sale.
It has a slightly different circuit, specially on the IDq regulation from the peak amp.
Maybe there was/is a problem with the "old" circuit that causes the peak amp to fail?
if your lnb is more than 200khz off the lnb freq 9750 (happens often!) then you will never see the beacon in the lower window. try to first find the psk beacon frequency without any entered lo and then calculate your real lo frequency.
in my case here i receive the psk beacon on 1101.048650 mhz.
real frequency is 10489.800mhz so my lo is exactly 9388.75135mhz.
entered that lo into sdr console and set the frequency display to "99" ghz you can now tune to 10489.800mhz and you see the beacon in the lower window almost in the middle
if a non standard signal appears i only scroll the bitrate higher or lower till i see the "circle". if you activate the fft filtering to sr then you have a first indication what sr is used.
vy73 db8tf
My PA has not arrived yet.
I'm curious if we get something out of the PA
73 Klaus
for sure we will get something out, but how much and at which efficiency
… and about the naming i found this:
25.04.20 because of not approved commercial use my submitted technical Infos are deleted
PA0P: mine does with 0,5W drive about 15W out
DL1GNM On a similar dish i receive the PSK beacon with abt 25db over TP noise, on your picture i estimate you have abt 20db there. So there is room for improvements.
73 de DB8TF
Has somebody already modified/tested this Amp on 2,4GHz?
vy73 DB8TF
Another unusual 150ks Transmission this time from DJ4ZZ
Yes they do.
But if you use the SW drift correction then no problem at all.
There are also RTL-SDRs with 0,5ppm TCXOs available for a few bucks.
73 DB8TF
The HD Line BP2 was the worst wobbling LNB i ever had in my hands.
Total trash.
Link > Receiving system not based on Octagon LNB
Maybe the wobbling on this LNB is caused by using only one xtal for 2 mixer/PLL ICs?
vy73 DB8TF