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Good paper on the subject. https://www.minicircuits.com/app/AN70-001.pdf Greg

Might Not be relevant, ... since applies to the 4274a,? but: Just noticed an Hp Service Note in the Hp 4274a LCR manual (4274a-12) : " Improvement for Memory Backup Battery " -- about swapping out

Okay, got it. Many thanks.

=== It is the adjustment trimpot just to the left of RF input. Between LO out and RF input. Ozan

AMPTD CAL is one of the trim pots on the front panel. The other is FREQ or FREQ ZERO. I cannot remember exactly. Look through the other Recall x instructions and one will be for the frequency pot.

The 10dB attenuator is probably recommended as it will help to improve the VSWR of the source impedance of the sig gen that is used to test the 8473C detector. This will help to minimise the overall

In step 3, it says "adjust". Look around the bottom box front panel and you will find it Vladan

Can't find any info on this Hp QSCH 1691 ( Schottky ) diode. It does not seem to be mentioned in either of the 1972, 1980, nor 1984 Hp Diode & Transistor Designer's Handbooks. Anyone have a .pdf

Hi all, The calibration procedure for this analyzer states that something called "AMPDT CAL" requires adjustment. However, I can find no such button on my particular analyzer. Everything else the

Saevar, One reason for the attenuator may be to provide a DC path to ground.? Many detectors require this, and some RF sources are AC coupled. --John Gord

Bill, It sounds like you are on the right track! So find out were the .04Ohm wire goes… Mike Sent: Saturday, August 31, 2024 2:29 PM To: [email protected] Subject:

Neat trick checking for shorts. As you expected probably, 0.04ohm. I have found one purple/white wire which when removed brings that up to 384 ohm. I'll be out of pocket for a day but will look

I was reading about the crystal detector HP 8473C and in the performance test section in the documentation, it is recommended to use 10dB isolation attenuator in series with the RF port and adjust the

Yves, thank you very much for all the suggestions and information with which I will continue my investigation In the meantime I received the 2.5mm socket wrench and after a little mod to adapt it for

Bill, So you replaced the pass transistor and Q9 then it popped the 3A fuse F4. And at that point the regulator worked but there must be a short on the -12.6V buss. Please run an Ohm meter check

Maybe only on certain interfaces? There's definitely nothing wrong w their configuration when you're close (network and latency-wise) to them. I mean, they often saturate the SSD disk writing

I wonder whether internet archive simply has TCP 1323 window scaling options disabled or clamped to a low maximum, or something like path mtu discovery broken by blocking ICMP type 3 code 4 packet too

Here's the images I have https://www.dropbox.com/scl/fo/05b2wr6le685c1dacwnw9/AMi9MTuEqv4IDBUyAQY2004?rlkey=4e1yka1xbnkhx6iiclziecntq&st=37jkmd83&dl=0 File sizes and MD5sums -rwxr-xr-x 1 root root

Those numbers just don't make any sense. I pulled all the transistors AGAIN, desoldered and cleaned. Tested them all with a meter, repopulate. Back to 23.5v.... [email protected]> wrote:

I forgot to send the mixer information. Blue wire, PIN SW: band0= +9.81v and band 1=-9.56V Green wire, BIAS: +3.9V Yves De : [email protected]