Search found 43 matches

by Audiotron
Tue Dec 12, 2017 1:16 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Sad news for IFR/Aeroflex 2975 owners
Replies: 4
Views: 6685

Re: Sad news for IFR/Aeroflex 2975 owners

Hi to all ,

I still intend to buy some of these faulty units and thoroughly research solutions...
by Audiotron
Tue Dec 12, 2017 1:13 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: COM-120B Power Supply polarity of the capacitors !!
Replies: 4
Views: 5972

Re: COM-120B Power Supply polarity of the capacitors !!

Hi Bob , unfortunately we do not have screen printing on the board, and are missing the capacitors on the board which would be easier to identify the polarity, with respect to the voltage line some I believe I already know the position but the corner are connected between different points of GND or ...
by Audiotron
Mon Dec 11, 2017 7:41 am
Forum: Test Equipment & RF Equipment Alignment
Topic: COM-120B Power Supply polarity of the capacitors !!
Replies: 4
Views: 5972

COM-120B Power Supply polarity of the capacitors !!

It is with a COM-120B missing some capacitors I believe are 120UF but someone has some photo so I can identify their polarity on the board ??

image link Power Supply : http://ap.imagensbrasil.org/image/dV1lC8


Thanks a lot
by Audiotron
Wed Nov 15, 2017 2:45 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

Re: IFR COM120B Manual Service

Hi ,

Sorry for the delay in return, The problem was really in the last MMIC amplifier (INA10386) of the unit OUTPUT GEN ....thank you Carl N0PXJ
by Audiotron
Fri Oct 06, 2017 6:19 am
Forum: Test Equipment & RF Equipment Alignment
Topic: Motorola R2001A Reboot when switching functions
Replies: 8
Views: 3899

Re: Motorola R2001A Reboot when switching functions

Hi ,

Unfortunately I have not, I already had some of these units for sale, but I had nothing left of them ... tried ebay ?
by Audiotron
Thu Oct 05, 2017 7:40 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Motorola R2001A Reboot when switching functions
Replies: 8
Views: 3899

Re: Motorola R2001A Reboot when switching functions

OK ,
I was thinking you were having RF level reading problems
by Audiotron
Fri Sep 29, 2017 3:28 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

Hi ,

the intention never to go against copyright, bad would be more important that there was more information for fundamental data recovery of HDD and perhaps a fixed topic with relevant information to repair this model of unit.
by Audiotron
Fri Sep 29, 2017 3:21 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: [Problems with 3 Aeroflex 2975]
Replies: 7
Views: 8639

Re: [Problems with 3 Aeroflex 2975]

Hi

I recovered some logic boards of this model and some had faults in the Vcore voltage electrolytic capacitors and others in the PWM oscillator of the processor voltages plus what is very common in this unit really are HDD failures.
by Audiotron
Thu Sep 28, 2017 12:24 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Bird Termaline Model 61 (1 & 5W)
Replies: 3
Views: 3119

Re: Bird Termaline Model 61 (1 & 5W)

Hi ,

The times I came across this model measuring incorrectly was with R102 changed..
by Audiotron
Tue Sep 26, 2017 6:08 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

unfortunately it is a negative point for an excellent instrument ...
by Audiotron
Tue Sep 26, 2017 5:10 am
Forum: Test Equipment & RF Equipment Alignment
Topic: [Problems with 3 Aeroflex 2975]
Replies: 7
Views: 8639

Re: [Problems with 3 Aeroflex 2975]

Hi ,

first make sure that you have a bootable 2975, then with the help of a PC and the DDrescue software try to recover the errors from the HDD using this software
by Audiotron
Sat Sep 23, 2017 5:43 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: [Problems with 3 Aeroflex 2975]
Replies: 7
Views: 8639

Re: [Problems with 3 Aeroflex 2975]

Hi JC ,

In these units 2975 there are important points to check, first check the Bios Battery, according to whether the RTC unit is perfect and a very important detail and check if the HDD has no damaged sector to do so use the DDrescue of LInux

Regards
by Audiotron
Fri Sep 22, 2017 12:17 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Motorola R2001A Reboot when switching functions
Replies: 8
Views: 3899

Re: Motorola R2001A Reboot when switching functions

Hi Trevor ,

I already got this fault on the K101 Relay,
by Audiotron
Thu Sep 21, 2017 6:45 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: [Problems with 3 Aeroflex 2975]
Replies: 7
Views: 8639

Re: [Problems with 3 Aeroflex 2975]

HI ,

Try turning off the drives hdd to see if there is a Bios startup screen..

Regards.
by Audiotron
Mon Sep 18, 2017 5:40 am
Forum: Test Equipment & RF Equipment Alignment
Topic: Motorola R2001A Reboot when switching functions
Replies: 8
Views: 3899

Re: Motorola R2001A Reboot when switching functions

Hi ,

It makes me think that to a deficiency in some line of feeding mainly of the + 5V !!
by Audiotron
Sun Aug 13, 2017 12:52 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: "Portable" spectrum analyzer for filter work?
Replies: 10
Views: 9955

Re: "Portable" spectrum analyzer for filter work?

The resolution for a portable device has its limitations, for determining types of adjustment I still prefer the line Hp and IFR, but that is a particular opposition and correct if you can get some for testing,

Hugs to the friend
by Audiotron
Fri Aug 11, 2017 8:06 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR 1900
Replies: 7
Views: 3926

Re: IFR 1900

Excellent option !!

Hugs from Brazil
by Audiotron
Fri Aug 11, 2017 8:05 am
Forum: Test Equipment & RF Equipment Alignment
Topic: R2200B transistor LV power suppply
Replies: 6
Views: 8353

Re: R2200B transistor LV power suppply

Hello My Friend, [
if you can give me the position where they are on the board, I can help you with greater precision

Hugs from Brazil
by Audiotron
Sun Aug 06, 2017 7:17 am
Forum: Test Equipment & RF Equipment Alignment
Topic: R2200B transistor LV power suppply
Replies: 6
Views: 8353

Re: R2200B transistor LV power suppply

M9706 would use BD679 , Already the M9648 I consider a little critical depending on his position on the board would try a 2n3904 and monitor the result..

Hugs from Brazil ....
by Audiotron
Mon Jun 05, 2017 12:28 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Need Com 120A help .....
Replies: 5
Views: 3371

Re: Need Com 120A help .....

Hi

Your problem is on the front keyboard, typically Matrix error disassemble it and see if the keyboard conductive ink has not been deposited on the conductive surface of the board..


Best Regards
by Audiotron
Mon May 01, 2017 2:21 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Need Com 120A help .....
Replies: 5
Views: 3371

Re: Need Com 120A help .....

Hi ,

I already got a fault on the 120B that one of the keys was stuck consecutively locked any command including ON/OFF
by Audiotron
Fri Apr 28, 2017 1:27 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

I believe that with the production time what was changing was the size of the HDD, with one or the other improvements, the biggest current problem when having the internal contents of the HDD would be the physical size of the HDD compatibilize with the BIOS
by Audiotron
Wed Apr 26, 2017 1:52 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120A rf power meter faults
Replies: 16
Views: 5730

Re: IFR COM120A rf power meter faults

Hi friend,

I also look for these manuals, but until today I did not succeed, after all information of these units are very well received I recover them bad always have defects that are necessary to use the service manual, and a pity there is not something that is for help.

Hugs
by Audiotron
Tue Apr 25, 2017 3:43 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

I own a 2975 without the HDD I would like to find the internal content of it to make these experiences !!
by Audiotron
Mon Apr 24, 2017 7:56 am
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

Hi to All ,

I never thought of going against copyright, I just think of saving vital files to the proper functioning of instruments that are now discontinued

Hugs from Brazil to everyone !!
by Audiotron
Sun Apr 23, 2017 6:17 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

Hello Wowbagger ,

you indicate some linux in particular to perform this type of procedure,

Hugs and a great night .
by Audiotron
Sun Apr 23, 2017 12:48 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Aeroflex (IFR) Questions
Replies: 629
Views: 295209

Re: Aeroflex (IFR) Questions

Hi Friend

Some Binary files and hard disk data of some instruments that I have, I am saving just for not having more support in this type of problem, and a pity an excellent instrument stopped for lack of a File

Hugs
by Audiotron
Tue Apr 18, 2017 6:32 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Building RF Equipment for Your Bench !!
Replies: 1
Views: 2434

GPIB to USB Interface using Arduino !!

Hi ,

I found it very interesting for those who want to communicate with your instruments.

Link : http://www.rudiswiki.de/wiki/GPIBtoUSB_Nano3
by Audiotron
Sun Apr 16, 2017 1:21 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

Re: IFR COM120B Manual Service

Thank you Carl,
I have already ordered the transistors as soon as they arrive, as a result of the operation,

Thank you very much.
by Audiotron
Tue Apr 11, 2017 8:04 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

Re: IFR COM120B Manual Service

Hi for All ,

Any ideas, anyone have any RF part diagram of 120B .
by Audiotron
Sun Apr 09, 2017 7:17 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: R2001C/HS will not power up.
Replies: 16
Views: 6085

Re: R2001C/HS will not power up.

Hi

Disregard my previous message after I saw that it is for model R2001D below the link of model R2001C and see page 5-36 of troubleshooting manual
Link : http://www.repeater-builder.com/test-eq ... op-man.pdf

Hugs
by Audiotron
Sun Apr 09, 2017 6:47 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: R2001C/HS will not power up.
Replies: 16
Views: 6085

Re: R2001C/HS will not power up.

Hi

Veja se este é o seu caso :
Imagephoto hosting

Hugs
by Audiotron
Fri Apr 07, 2017 7:47 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

Re: IFR COM120B Manual Service

Hi ,

From what I analyzed one of the transistors seems to me to be the MAR-8 MMIC of 50 Ohms the other I am in doubt.

Hugs for all
by Audiotron
Fri Apr 07, 2017 6:40 am
Forum: Test Equipment & RF Equipment Alignment
Topic: R2400 Freq. Error
Replies: 5
Views: 3036

Re: R2400 Freq. Error

Typically for both TCXO or OCXO when out of frequency, at higher frequencies the value doubling error
by Audiotron
Fri Apr 07, 2017 5:04 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

Re: IFR COM120B Manual Service

Hi ,

Would anyone know the Part Number of the transistors used in the RF output of the generator function.

Thank you for All
by Audiotron
Thu Apr 06, 2017 12:32 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR 1900 LCD brightness
Replies: 2
Views: 2747

Re: IFR 1900 LCD brightness

Hi Friend

By the time of use the CCFL lamps can be with excessive wear, I have replaced them with LEDs and their current control to modify the luminous intensity by PWM control
by Audiotron
Thu Apr 06, 2017 10:36 am
Forum: Test Equipment & RF Equipment Alignment
Topic: Building RF Equipment for Your Bench !!
Replies: 1
Views: 2434

Building RF Equipment for Your Bench !!

Besides being very fond of test instruments for RF, I really like to build some we can exchange ideas about assemblies that could help in the day to day of each one, here is the idea...

Great work, everyone and a great day !!
by Audiotron
Thu Apr 06, 2017 7:10 am
Forum: Test Equipment & RF Equipment Alignment
Topic: R2400 Freq. Error
Replies: 5
Views: 3036

Re: R2400 Freq. Error

Hi friend

Typically when we have a problem in the TCXO when the frequency goes up the error is usually higher

good repair , Hugs
by Audiotron
Thu Apr 06, 2017 4:48 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120A rf power meter faults
Replies: 16
Views: 5730

Re: IFR COM120A rf power meter faults

Hello Friend

I tried contacting this email : info@cobham.com , Not yet replied !!
but it is the only contact I unfortunately have of Aeroflex

I believe they can still sell the Manual Service for this equipment.

Good repairs, Hugs
by Audiotron
Wed Apr 05, 2017 10:17 am
Forum: Radio Programming
Topic: Link Schematic Rib for All
Replies: 0
Views: 3203

Link Schematic Rib for All

Hi

Follow link :
http://projetospu4pqn.weebly.com/

Hug to everyone
by Audiotron
Wed Apr 05, 2017 6:28 am
Forum: Test Equipment & RF Equipment Alignment
Topic: IFR COM120B Manual Service
Replies: 6
Views: 5040

IFR COM120B Manual Service

Hello friends

Would anyone have the Aeroflex IFR COM120B Service Diagram or Service Manual?
I have a problem drive on the RF Generator, not generating level at the output. Some

Thank you all and a great day to all of you.

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