Thanks that you give me some courage. I opened it. Unscrewed all - wow what a filter (a monolithic milled alu block, 4 resonators!) - screwed it together, now it works. Do not know why :-)
M. On Wed, Dec 22, 2004 at 07:45:22AM -0800, Friedel Bruening wrote: > If I would be you, I would open up the thing and see what's there, > even HP is cooking with water only. If the input stage is all soldered you > can at least > check power to get started. There should be some tuner type bradband input > stage > with some active parts MMIC's. They only way to know will be have look. > Your are an somewhat experienced electronic engineer or ? > The schematics I believe you should be able to find, you may have to pay, > check ebay, there are lot's of offers of manuals. > > Sch�ne Weihnachten > > Friedel > > > > On 22 Dec 2004 at 7:05, Matthias Weingart wrote: > > > Hi, > > > > today I got a HP 8559A spectrum analyser. Unfortunately the > > input stage seems damaged (every thing works, but I do not see > > any change in the display when I apply a signal - only noise). > > It can display a range of 3GHz at once (and with mixing up to 21GHz). > > What do you think? Are there any chances that I can repair > > the input stage myself? I have not opened it yet, but I guess > > there are some hard to get parts inside, and I do not have any > > circuit diagrams. Anyone here with some experiences in this field? > > > > thx in advance, > > > > Matthias > > -- > > Author: Matthias Weingart > > INET: [EMAIL PROTECTED] > > > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > > --------------------------------------------------------------------- > > To REMOVE yourself from this mailing list, send an E-Mail message > > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > > the message BODY, include a line containing: UNSUB CHIPDIR-L > > (or the name of mailing list you want to be removed from). You may > > also send the HELP command for other information (like subscribing). > > > Friedel Bruening > Bolivian Instruments > Casilla 4856 > Santa Cruz > Bolivia > Mobile : ++591-773-92119 > Tel/Fax : ++591-3-3580572 > e-mail : [EMAIL PROTECTED] > -- > Author: Friedel Bruening > INET: [EMAIL PROTECTED] > > Fat City Hosting, San Diego, California -- http://www.fatcity.com > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). Matthias -- Author: Matthias Weingart INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
