[Premium-Rx] R&S EK070 defect: help wanted

Tue Dec 18 07:37:38 EST 2018

Check here, page 276: http://www.bitsavers.org/components/unitrode/_dataBooks/1982_Unitrode_Semiconductor_Databook.pdf

best regards,
kai

> 
> Message: 1
> Date: Mon, 10 Dec 2018 16:02:37 +0100
> From: "C. van Ravenswaaij" <cortec at telfort.nl>
> To: Premium-Rx at mailman.qth.net
> Subject: [Premium-Rx] R&S EK070 defect: help wanted
> Message-ID: <fd8a6207-b5c2-ddc5-391c-e464dc950663 at telfort.nl>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> Hi all,
> 
> My R&S EK 070 stopped working after a clear collapse of the power 
> supply. This receiver has the Mains/Battery Power Supply Unit N3.
> On the control board a four legged transistor (?) type PIC637 is defect, 
> referred to as T22 and T23 on schematic 629.9018 AC/DC-Netzteil (Power 
> Supply)
> I do have the schematic and the fault finding procedures, but do not 
> have the parts list.
> 
> Does anyone have the corresponding Sachnummer (parts number) of this PIC637?
> Does anyone have this PIC637 for sale?
> Does anyone have specifications on this PIC637 and/or a replacement type 
> number?
> Does anyone have a N3 or N1 power supply for sale?
> 
> Thanks in advance for your help.
> 
> 73, Cornel
> PA3BTS
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Tue, 11 Dec 2018 07:46:35 +0100
> From: "C. van Ravenswaaij" <cortec at telfort.nl>
> To: Premium-Rx at mailman.qth.net
> Subject: Re: [Premium-Rx] R&S EK070 defect: help wanted
> Message-ID: <1f120bb3-1f72-21a4-d11f-3668f556e776 at telfort.nl>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> Thank you, Bob, Michael and Dan, for your help.
> It looks like this is going to be a difficult search and costly repair!
> 
> 73, Cornel
> 
> Op 10-12-2018 om 16:02 schreef C. van Ravenswaaij:
>> Hi all,
>> 
>> My R&S EK 070 stopped working after a clear collapse of the power 
>> supply. This receiver has the Mains/Battery Power Supply Unit N3.
>> On the control board a four legged transistor (?) type PIC637 is 
>> defect, referred to as T22 and T23 on schematic 629.9018 
>> AC/DC-Netzteil (Power Supply)
>> I do have the schematic and the fault finding procedures, but do not 
>> have the parts list.
>> 
>> Does anyone have the corresponding Sachnummer (parts number) of this 
>> PIC637?
>> Does anyone have this PIC637 for sale?
>> Does anyone have specifications on this PIC637 and/or a replacement 
>> type number?
>> Does anyone have a N3 or N1 power supply for sale?
>> 
>> Thanks in advance for your help.
>> 
>> 73, Cornel
>> PA3BTS
>> ______________________________________________________________
>> Premium-Rx mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/premium-rx
>> Help Page: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Premium-Rx at mailman.qth.net
>> Help Contact eMail:? radio at 8zo.com
>> Home Page:? http://www.premium-rx.org/
>> 
> 
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Tue, 11 Dec 2018 19:56:22 -0500
> From: Glenn Little WB4UIV <glennmaillist at bellsouth.net>
> To: premium-rx at mailman.qth.net
> Subject: Re: [Premium-Rx] R&S EK070 defect: help wanted
> Message-ID: <a5d72f61-a624-8c69-6283-ba2c4fcecc0d at bellsouth.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> PIC637 is a standard part.
> 
> The datasheet was in the first few finds from Google.
> It consists of two NPN transistors as a darlington, a diode and two 
> resistors.
> It is rated for -100 Volts in and 15A dissipation.
> 
> 
> Glenn
> 
> 
> On 12/11/2018 1:46 AM, C. van Ravenswaaij wrote:
>> Thank you, Bob, Michael and Dan, for your help.
>> It looks like this is going to be a difficult search and costly repair!
>> 
>> 73, Cornel
>> 
>> Op 10-12-2018 om 16:02 schreef C. van Ravenswaaij:
>>> Hi all,
>>> 
>>> My R&S EK 070 stopped working after a clear collapse of the power 
>>> supply. This receiver has the Mains/Battery Power Supply Unit N3.
>>> On the control board a four legged transistor (?) type PIC637 is 
>>> defect, referred to as T22 and T23 on schematic 629.9018 
>>> AC/DC-Netzteil (Power Supply)
>>> I do have the schematic and the fault finding procedures, but do not 
>>> have the parts list.
>>> 
>>> Does anyone have the corresponding Sachnummer (parts number) of this 
>>> PIC637?
>>> Does anyone have this PIC637 for sale?
>>> Does anyone have specifications on this PIC637 and/or a replacement 
>>> type number?
>>> Does anyone have a N3 or N1 power supply for sale?
>>> 
>>> Thanks in advance for your help.
>>> 
>>> 73, Cornel
>>> PA3BTS
>>> ______________________________________________________________
>>> Premium-Rx mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/premium-rx
>>> Help Page: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Premium-Rx at mailman.qth.net
>>> Help Contact eMail:? radio at 8zo.com
>>> Home Page:? http://www.premium-rx.org/
>>> 
>> 
>> 
>> ______________________________________________________________
>> Premium-Rx mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/premium-rx
>> Help Page: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Premium-Rx at mailman.qth.net
>> Help Contact eMail:? radio at 8zo.com
>> Home Page:? http://www.premium-rx.org/
> 
> -- 
> -----------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Sat, 15 Dec 2018 11:27:27 -0800
> From: HL Serra <hlserra at gmail.com>
> To: premium-rx at mailman.qth.net
> Subject: [Premium-Rx] SotaBeam Audio DSP filter for RA6790
> Message-ID:
> 	<CAM4=gM9j4h0utQhDF_1Jo4ZbtcVmYmLhhXSa4-6LTJn-TmFobA at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
> 
> Folks- Just a heads-up for RA6790 owners:
> 
> I have never discussed a product before, but I now have a tiny Sotabeam
> CW/SSB DSP audio filter for the 6790's audio output, which removes a lot of
> audio hash/crackle when listening to CW or SSB. It is my 2d of Richard's
> filters, and besides the even tinier DIY pc board version, he has
> simplified the filters to include a small aluminum box, a volume control,
> and a CW/SSB B/W switch. <
> https://www.sotabeams.co.uk/amplifier-and-enclosure-kit-for-laserbeam-dual-filters-filter-included/
>> 
> They are also available as a wide and narrow B/W CW or SSB. for ~~$68
> delivered to US.
> 
> The filter works great with headphones or a small speaker, and removes much
> distracting old-component noise in my 6790. (YMMV). This is my second one
> of these filters, and they are both very useful to me.
> 
> Cheers, and 73,
> 
> Larry N6NC
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Tue, 18 Dec 2018 05:52:14 -0500
> From: William Schaffner <pjxii at yahoo.com>
> To: premium-rx at mailman.qth.net
> Subject: [Premium-Rx] Premium-RX Repairs
> Message-ID: <61CD3D0D-D39E-4488-90C1-30E3B97ED45A at yahoo.com>
> Content-Type: text/plain; charset=us-ascii
> 
> Unlike (seemingly) everyone else who subscribes I am just an appliance operator, and can't do my own repairs. Does anyone know where I can have my Cubic CDR-3350 serviced?  I'm pretty sure I can't just send it off to Cubic anymore. Thanks for any help!
> Bill
> 
> 
> ------------------------------
> 
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> 
> End of Premium-Rx Digest, Vol 145, Issue 2
> ******************************************