Posts by iw5bsf

Quote from SV1BDS

Hi, anyone try this ADF4351 frequency generator?

Hi George, I bought one two months ago, I measured the power of about 0 dm and since it uses the reference 25 mhz tcxo, I try it again and then I send you the photos (used to test my 2.4 ghz pa)

73 Roberto

hello China delete proposal allocation amateurs radio

report link arrl

http://www.arrl.org/news/china…rrent-amateur-allocations

73 de Roberto

Pipe cap 3 cm

I'm glad you solved it! 2.5 db good

Roberto

Quote from SV1BDS

Hi, a 15 mm pipe cap filter for 10 Ghz using guidelines from W1GHZ .

Insertion loss is about 4 dB. Probe lengths are about 3 mm.

BW must be about 200 MHz.

hi George , looking on the internet 2012 RA3WDK pipe filter 3cm loss 2.5 db

73 Roberto

Hi George, thanks for the previous technical support, I wish you new year's eve, I found this interesting link of f6bva converter 10 GHz up converter 2.4 GHz

https://f6bva.pagesperso-orang…e/Satellite/Satellite.htm

73 de Roberto

Hi it could be useful all the pc AD8302 purchased on ebay seems to have some problem of welding with low tin I found some broken escape capacitors according to what the laminate does not seem to be fr4 but poor in laminate as it badly attacks tinning I has already happened in the past this problem even the capacitors are of poor quality

73 de Roberto

helloi George

I connected ad8302 and directional coupler in the absence of an RF signal, display, so I gave -10 dm in a directional coupler input terminated with a direct 50 hom load, then reversed the ad8302 inputs

73 Roberto

update

hello, I discovered that the directional coupler sma rg316 false contacts on the stocking and a hom 52 resistor do not work on the ad8302 board with what value I can replace it (I measured the other and 53 hom)

no I know if I used the 2.4 gHz input + 10 dbm of the rf generator relationship between two and directivity

73 Roberto

I found these notes i5tdj Piero sk

measure of derittivity

a source rf is connected to the input of the coupler at the desired frequency and to the output a load 50 hom that has very low ros (at least 30 db reyurn loss). From the secondary line will come out a saw proportional to the power going from the input to the load (since the load is very good, the power reflected, from the load to the input is negligible). This level is measured. The coupler is reversed, connecting the RF source and the load input to its output. low of the previous one. The relationship between the two signals expressed in db and the derittivity of the coupler

have a 436a power meter with a head of a minimum of -30 dbm + 20 dbm

Hi George thank support ok instructions Internet I'll let you know as soon as possible

73 de iw5bsf Roberto

hello George

Hi, ok I have two 10 db attenuators composed of 5 + 5

minimum level -100 dbm of the generator 10 db steps terminators/dummy 50 hom sma max 1watt dc-18 ghz

Hello George the ad8302 has arrived today, I have an analyzer but without tracking for the attenuators I have two 8db or 10db (2x5) mini-circuits as a signal source a maximum level generator +10 dbm

Hello George I finished assembling the directional coupler and enough + 10 dbm to test it which power is adequate?

73 de iw5bsf Roberto

thank you for your patience, now I understand even looking at the picture window of 30 mm * 2 mm

73 de iw5bsf Roberto

how much the two cables of the two lines must be in total

Do I need to cut the ut141 cable as a useful measure of both cables? considering 30 mm

73 de iRoberto

thank

thanks but they are both 30 mm long ?

73 Roberto

I'm sorry I meant the data for the construction of the directional coupler in mm if you can pass them to me

thqank

73 Roberto

directional coupler

Hello George which measures have two ut141l directional coupler cables

Roberto