Hi
What PCB material is being used is it standard FR4 or Rogers?
73 Keith GU6EFB
Hi
What PCB material is being used is it standard FR4 or Rogers?
73 Keith GU6EFB
OMG, that thing makes me sleepless.
62 holes, 31 threats
73, Thorsten
That are a lot of screws! My experiment screws the amp above with (if that amp delivers really 30W) by +10 dB.
You have 30W out with 29 screws, that is 1W/screw.
I have 20W out with 2 screws, that is 10W/screw.
So my 'screw factor' = 10log (10/1) = +10 dB and/or
my screw factor = 10log(1/10) = -10 dB.
Screw factor ≠ 'screw factor' (note the quotes)
;; -)
OMG, that thing makes me sleepless.
62 holes, 31 threats
73, Thorsten
Torsten, since I built these amps I am thinking daily about purchasing an automatic thread cutter
M0KDS is bilding these boards, just found it on twitter:
hallo everyone...
after given info from DD4YR ... i will prefer this amp.... maybe after the MRF21120 is died (but i dont think so)
TNX ROBERT for THIS INFO ...
What TX amplifier do you plan to use?
I think it works so like hoped before .... VERY NICE !!!
73 de michael dg0opk
Hi,
I also finished building an amplifier based on the Andrews module with the MRF21045.
Special thanks to DK5Dn for publsihing his modifications which worked perfectly well for me.
You can find my setup and the results here: Modification of Andrew AP module with MRF21045 for 2.4 GHz
Kind regards
Matthias
For all owners of ex-telecom Power Amplifiers with 2.1 circulators please note:
There are currently 125 Watt NOVA drop-in circulators for 2300-2400 MHz on offer at eBAY !!
And cheap, about 10 dollar each !! Multiple lots are offered, e.g. for 5 and 12 units, no shipping cost.
Look here: https://www.ebay.com/itm/LOT-o…id=p2047675.c100005.m1851
73 de Cor