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 on: Yesterday at 07:40:51 am 
Started by Doc11 - Last post by Fletcher
While I'm not a lawyer [don't even play one on TV]... one would think that recording ambient sounds in YOUR OWN domicile is perfectly acceptable.  While the neighbors have a reasonable expectation of privacy in their own domicile, at the end of the day their sound is invading your space -- and you are recording the ambient sounds of your space.  There is no reasonable expectation of privacy once their sound has entered your air.


 on: Yesterday at 06:11:07 am 
Started by Doc11 - Last post by lioneljohn
From reading your post, I don’t think you need to have the most sophisticated devices for doing the process. Devices with less precise recording abilities can be used for the purpose. Anyway you have to check the legal issues related with the same.   Pacific Die Casting California   

 on: September 20, 2017, 01:35:54 am 
Started by Geoff Doane - Last post by MaxReedLeo07
First, the photo you want to apply must be uploaded into your pc, from your cellphone, or camera, and preferably as a jpg report, even though a gif document will paintings, too. Make sure you've got a photo report set up to upload the picture to.

 on: September 19, 2017, 03:48:34 pm 
Started by Dominick Costanzo - Last post by Dominick Costanzo
We've a Sony PCM-3402 machine that has a power supply failure.
A sub board in the supply, Sony part # 1-614-406-11 had 3 components fail.
One of the components, D12, exploded. It's face with the part number becoming one with the cosmos.
It is a 3 leg item, most likely a half wave rectifier.
Although I have a full service manual, the supply, Sony Model UR-08, is referred to only as a part in the manual.  No schematics or component lists are in the manual. Without a parts list I have no way to attempt repair.
A month of communication with Sony Professional Electronics have lead only to dead ends.
Sony Professional Electronics has thrown out and destroyed all spare parts, test jigs, and documents related to this machine.

 on: September 19, 2017, 03:35:20 pm 
Started by Dominick Costanzo - Last post by Dominick Costanzo
Does anyone have working experience in repair of Sony PCM-9000 magneto optical recorders?
I have 3 machines, all with issues.
Sony Professional Electronics has thrown away all test jigs, spare parts and documentation of these machines.
I've a full service manual but nothing else.

Dominick Costanzo

 on: September 18, 2017, 05:29:13 pm 
Started by mu90r - Last post by mu90r
I am looking for a head or capsule K47 or M7 for U47 in good condition.
The k47 capsule is vintage and still in good condition ,the best.
Any offer by private.

 on: September 18, 2017, 01:07:01 pm 
Started by Kultivator - Last post by klaus
In your opening post you reported that you have 9 Volts at the DC board's Zener. That indicates that the  amp board is healthy, and the problem must be located on the DC board which is not pumping out the required high voltages for the capsule.

Hence my advice for troubleshooting the always suspect Tantalums on the DC board.

 on: September 18, 2017, 07:17:42 am 
Started by Neutrino - Last post by Neutrino
Finally, with some help from eBay, I was able to return the PL20 for a refund. Thanks anyway to everybody for your help!

Prior to returning the PL20, I also did a simple measurement of the frequency response of both mics (PL20 and RE20) with my limited possibilities. Since I don't have an anechoic chamber, I used a calibrated measurement mic (Beyerdynamic MM1) as a reference and measured all three microphones with RoomEQ Wizard, which is normally used for room measurements. All mics were positioned at the same spot at less that 1m distance from a monitor speaker in my control room. The attached plot shows the results (green: MM1, blue: RE20, red: PL20).

Since the MM1 is supposed to be pretty flat, it only shows the influence of the speaker and the room at that position. Any deviation from this should be attributed to the microphone.

The response of the RE20 resembles the official curve published by EV: a peak around 8 kHz and a dip around 4.5 kHz. Below that frequency the curve is rather close to the measurement mic meaning a pretty flat response.

Now the PL20 shows a strong peak (~+10dB) around 3kHz, which is neither present in the measurement mic, nor the RE20. This is also in line with what we were hearing in the samples I posted initially. Whether one can conclude from this that the PL20 is defective, I don't know. But it is certainly strongly out of spec. Just thought it would be interesting to post.

 on: September 18, 2017, 03:27:38 am 
Started by Kultivator - Last post by Kultivator
Yes,IŽll try that. But first I would like to rule out the amp board, the amp board feeds the dc board with 8v when I measure black-red wire coming from the amp board to DC board and DC board disconnected. IsnŽt that low?

One strange thing is when I engage the low-cut circuit voltage rises to 10v :-\


 on: September 17, 2017, 12:47:38 pm 
Started by Kultivator - Last post by klaus
The fact that the voltage increased dramatically after disconnecting the DC board's electronics points to a component on the DC board, or, more likely, the 9.1V Zener on the DC board does its work, and that points even more to a shorting component on the DC board.

Methodically replace capacitors on the DC board with polarized electrolytics, particularly the 10nF and 22nF are suspect. If that does not bring up the voltage, which most likely it will, you need to check out the zeners, particularly the 9.1V.

P.S.: Leave the thin wires around the switches alone, They are not involved in this type of troubleshooting at the moment.

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