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Details about  Comtek PR-72b 72.1 MHz Wireless Audio Receiver GRADE DB

Comtek PR-72b 72.1 MHz Wireless Audio Receiver GRADE DB See original listing
Comtek-PR-72b-72-1-MHz-Wireless-Audio-Receiver-GRADE-DB
Item Ended
Item condition:
Used
Ended:
20 Jan, 2011 09:38:27 AEDST
Price:
AU $75.00
[
History:
]
Postage:
AU $10.00 Standard Postage | See details
Item location:
Sydney, NSW, Australia

Description

eBay item number:
160424873117
Seller assumes all responsibility for this listing.
Last updated on  16 Aug, 2010 09:26:38 AEST  View all revisions

Item specifics

Condition:

Used

Brand:

Comtek

Microphone Type:

Wireless Microphone

Product Type:

Microphones



 

Comtek PR-72b 72.1 MHz Wireless Audio Receiver GRADE DB



Description

Comtek PR-72b Personal Companion Receiver - GRADE DB

PLEASE CHECK OUR OTHER SALES FOR MORE OF THESE MODELS IN DIFFERENT GRADES AS WELL AS M72 TRANSMITTERS AND UNITS WITH DIFFERENT FREQUENCIES

This sale is for 1 only PR-72b receiver. The pics may show more than 1 but again this sale is for 1 only unit. Batteries are not included. We offer these units as working and in condition as according to our own grading system. They are not offered with any warranty and can not be returned.

We have a few of these to sell and they are in different grades. All have been exhaustively tested, adjusted & graded as to performance, range, output levels and cosmetic appearance. All input connectors for monitoring have been adjusted as required for a tight fit. All output connectors are mono only, if you require monitoring in L & R you will need to use an 3.5mm Stereo to Mono adaptor. All battery covers clip into place and all units are fitted with the A Frequency Crystal (72.1 MHz). None of the units have breaks or cracks.

We have 2 versions of the PR-72b, the difference between them is in the volume knob, this is either a low surface type or a larger knob. Some of the low surface types have lost their knob and need adjustment by flat screwdriver or your thumbnail.

Remember, this is a used radio receiver, we have gone out of our way to test and adjust and accurately describe the condition of these units, your own findings may vary from ours. We can not control this. You may find that the PR-72b you buy from us differs from one you already have, again we are unable to control this. We would ask that you accept that we have done all we can to set these up, test & adjust and do not post negative feedback if you are not entirely happy. These units are probably the most tested and best described used PR-72b units available on the market right now and are priced fairly.

AVAILABLE GRADED UNITS

Performance Grade

  • A - None, we would consider A grade to be brand new and these are not.
  • B - Unit is complete, has an Obstacle Range of 15-20M and a Line of Sight range of 30-50M, volume Knob is complete
  • C - Unit is complete, has an Obstacle Range of 15-20M and a Line of Sight range of 30-50M, volume Knob is missing or turns 360 degrees with no Stop but works ok
  • D - Unit is complete, has an Obstacle Range of 10-20M and a Line of Sight range of 30-50M, volume Knob is complete
  • E - Unit is complete, has an Obstacle Range of 10-20M and a Line of Sight range of 30-50M, volume Knob is missing or turns 360 degrees with no Stop but works ok

Cosmetic Condition Grade

This grade relates only to cosmetic appearance, some units are yellow in appearance.

  • A - None, we would consider A grade to be brand new and these are not.
  • B - Slight discoloration, some marks and scratches
  • C - A lot of yellowing of the case, some marks & scratches.

Summary of Grade Description

Units are graded firstly with Performance Grade then with Cosmetic Grade, an example is:

DB
D - Unit is complete, has an Obstacle Range of 10-20M and a Line of Sight range of 30-50M, volume Knob is complete
B - Slight discoloration, some marks and scratches

UNIT DESCRIPTION

COMPLETE SPECIFICATION SHEET

The PR-72b Companion receiver is a high performance miniature receiver. And due to its excellent performance and many available options, this versatile receiver may be used for many applications - IFB and professional studio communications, personal cueing, industrial communications, and individual auditory assistance, to name a few. Also, because of its extended frequency response and low noise level, the PR-72b is a convenient receiver to use with portable tape recorders.

The PR-72b incorporates the latest state-of-the-art technology offering low power consumption for longer battery life (up to 40 hours). Special features include an LED battery condition indicator, automatic on/off power switch, battery charging access through the output jack, slide-open battery compartment, and no external antenna - only the output cable extends from the receiver.

The following options are also available: plug-in channel selector, external microphone input for specialty applications, switch for two-channel operation and an independent on/off switch. Moreover, the PR-72's small size and light weight make it easy to carry in a pocket or pouch.

SPECIFICATIONS

Audio Outputs : 2.5 volts RMS, adjustable volume control nominal load 50-600 ohms (100 ohms nominal)
Connectors : 1/8" mini jack (locking plug optional)
Indicators : LED battery condition indicator
Audio Frequency Response : 100 Hz to 10 kHz with M-72 transmitter
Operating Radio Frequency : Single channel, 50-215 MHz
Frequency Stability : .005% crystal controlled
RF Sensitivity : 1 µV for 20 dB of quieting
Adjacent Channel Rejection : -55 dB with 50 kHz channel spacing (72-76 MHz)
Image and Spurious Response : At least -60 dB (72-76 MHz)
Ultimate Quieting : Better than -65 dB related to output
Bandwidth Acceptance : Up to 30 kHz deviation
Antenna : Intergral with output cable (no external antenna)
Current Drain : 14 mA nominal
Battery : 9 volt alkaline Eveready 522 or equivalent or optional 9 volt nickel-cadmium rechargable battery
FCC Compliance : Certification under Part 15
Dimensions : 1 1/16" X 2 1/4" X 3 1/4" (27 mm X 57 mm X 83 mm)
Weight : 4 ounces (110 grams) approx.

COMTEK PR-72B TEST PROCEDURE

Comtek M72 Setup - Obstacle Test

  • Wireless Microphone plugged into a PC Line output, set to 50% output level, generate constant tone
  • Fitted with a 30 cm whip antenna
  • Battery voltage between 8.2 to 9V
  • Set upright on desk next to PC

(POINT A - 4M) - Room with gyprock walls on timber frame, wooden door closed M72 4M from door.
(POINT B - 12M) - Garage style roller door 8M from wooden door.
(POINT C - 13M) - Outside garage roller door
(POINT D - 19M) - Sedan car parked behind roller door 6M from roller door
(POINT E - 24M) - Driveway behind Car +5M
(POINT F - 29M) - Driveway behind Car +10M

Comtek PR-72b Setup

Input connector checked for electrical connection and tightness, adjusted if needed for tight fit
Battery voltage between 8.2 to 9V
Fitted with small personal Sony headphones
Walk tested to behind car (18M)
Signal monitored for quality and background noise when moving & when stopped and move unit for optimal signal

Results

All units worked perfectly to POINT C - 13M
Some units experienced some choppy noise and hiss between POINT C - 13M and POINT D - 19M

These units are labelled OBST 10-20M When stationary at this range they are clear.

Units that were relatively clear to POINT E - 24M to POINT F - 29M are labelled OBST 15-20M. When stationary at this range they are clear.

Line Of Sight Test

M72 & PR-72b taken outside and tested facing each other with no obstacles. Units were relatively clear up to 30M even when moving. At the 30M mark they became choppy depending on transmitter antenna orientation and receiver orientation. This choppiness was more pronounced when walking between 30-50M. At 50M all units were able to hold a clear signal when stationary and units moved to optimise reception.

Output Level Tests & Adjustments

M72 connected to SQN Mixer with constant tone, output volume of M72 fixed to around 50%
PR-72b connected to input of SQN Mixer in the same room as M72
PR-72b Headphone volume set to Maximum
Noted input meter position to determine output level of receiver, set a reference for one PR-72b at 0 dB
All PR-72b receivers connected to SQN Mixer and internal output pot adjusted to bring to 0dB level
All PR-72b are now outputting the same level of signal at MAX volume setting

PC














Payment

We accept the following methods of payment:

  • EFT Direct Bank Deposit / TT / Draft (St George Branch or Internet)
  • Paypal for security we only deliver to the Paypal registered address. If you pay us with Paypal and ask to deliver to a different address, we will refund your Paypal and ask you to correct the Paypal address and re-submit the payment.
  • Bank Cheque or Australia Post Money Order send to PO Box 3125, North Strathfield NSW 2137
  • Cash available if you will be doing a personal pickup from Concord or Seven Hills
  • Australia Post COD (only by arrangement prior to bidding)

    No other form of payment is acceptable unless you have made a prior arrangement with us.


  • Shipping

    WE OFTEN HAVE UNUSUAL & HEAVY PACKAGES. EBAY IS OFTEN NOT ABLE TO CORRECTLY ESTIMATE THESE AS WE ARE NOT ABLE TO LOAD OUR COURIERS FREIGHT COSTS INTO THE EBAY CALCULATOR. CHECK THE LISTING FOR SHIPPING COSTS. IF THEY ARE NOT IN THE LISTING THEN YOU CAN USE THE EBAY CALCULATOR. WE WILL CORRECT THE SHIPPING COST IN YOUR EBAY INVOICE AFTER SALES AND BEFORE YOU PAY.

    All goods will be delivered correctly packaged to minimise any damage in transit. This may lead to slightly oversized packages which has an effect on shipping cost. All goods will be tested & cleaned unless otherwise noted in the listing.

  • Packing Fees we charge a packing fee which includes cost of packing materials and labour to pack the item, usually around $10 per item, this is included in the eBay shipping charges calculator by postcode.


  • Pickup/Collection we are based in Concord & Seven Hills, Sydney, NSW 7 days a week, you can arrange collection day or night, just call 0406-181000 to arrange. Goods picked up will not be packed, if required, packing costs an additional $10.

    WE USE THE EBAY STANDARD BUILT IN SHIPPING CALCULATOR UNLESS NOTED OTHERWISE

    AUSTRALIAN DELIVERIES

  • Australia Post you do not require to be home for this delivery, a card will be left for you to collect from you Post Office if you are not home. We are unable to advise you specifically when the courier will arrive. Depending on location we may use Australia Post or Fastway to deliver.

  • Couriers for certain deliveries depending upon the size of the item and your location, you will need to be at the delivery address from 9 am to 5 pm Monday to Friday.

  • WORLDWIDE DELIVERIES

    WE ARE UNABLE TO DELIVER TO RUSSIA AS FEDEX WILL NOT DELIVER AN ITEM OVER US$75 TO RUSSIA. If we will deliver this item Worldwide (indicated by whether or not the eBay shipping calculator will quote delivery to your country) we will use Australia Post Airmail, Express Post or Express Courier or Fedex depending on the location & cost.

    SHIPPING INSURANCE

    UNLESS WE ARE SHIPPING WITH FEDEX (ALWAYS INSURED), by default, no item shipped by us includes any insurance or cover for loss or damage to the item in shipping. If you require Shipping Insurance simply add 3% or $3 per $100 at the time of checkout. For Example : An Item Value = $75, Insurance = $3, Item Value $165, Insurance = $6 and so on.

    CUSTOMS DUTY, TAX, VAT & IMPORT COSTS

    If you are not located in Australia, you will be importing this item into your country and may be liable for additional taxes, duties, VAT, etc. We are not liable to pay these taxes. We are not able to declare the item as a gift or declare a lower value than the sell price in Australian Dollars.

    Terms of Sale

  • In Australia our sales include GST unless stated otherwise for sale of a personal item for instance.
  • If applicable for sales made to Australian locations, a GST Invoice will be given with each item.
  • Please only bid if you intend to purchase.
  • If you win the auction you must contact us within 24 hours. We will bombard you with emails after this time!
  • Payment is required within 48 hours. If you need longer then contact us before bidding, we can usually make arrangements if we know in advance.
  • We will despatch your order within 2-3 working days from your payment date.
  • Unless otherwise noted you are welcome to collect your item from Concord or Seven Hills, NSW.
  • Warranty is usually not offered, if it is offered, it will be noted in the listing, if no warranty is mentioned then no warranty is offered. We are not unreasonable, contact us with any issues and we will see what we can do.
  • Warranty will require that the item be sent back to us at your expense unless noted otherwise in the listing. If we can identify a specific part that has failed we will send this to you rather than you having to return anything.
  • We usually answer all questions on the day they are posted.
  • In the event of a dispute please be advised that we use the guidelines as per Fair Trading Act of NSW.


  • About Me

    Videopartsworld is a specialist eBay seller located in Sydney, Australia with a number of active eBay accounts. This eBay account is used for Professional Video & Audio equipment. Everything we sell is in stock and has been inspected by us. We do make mistakes like everyone, we usually notice these very quickly and will contact you asap, please be understanding.


    Contact Us

    You can contact us using the eBay form (preferred) or if for some reason you do not want to use the eBay form, send us an email to sales@videopartsworld.com or phone/text or SMS on 0406-181000 (INTERNATIONAL +61-406-181000). Please do not ask questions about delivery charges or stuff that is already mentioned in the ad! We take great care to specify everything as we are also very demanding as eBay buyers but if we have omitted anything or the listing is not clear please feel free to ask.




    Questions and answers about this item

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