Welch 74710 Diagnostic Tran...

Welch 74710 Diagnostic Transformer Power Unit w/ Dual Handles – Tested & Working

Device Information:

Manufacturer: Welch Allyn, Inc.
Model Number: 74710
Description: Transformer Power Supply Unit
Input Voltage: 120 V AC ~ 60 Hz / 0.1 A
Output Voltage: 3.5 V AC / 0.7 A
Date of Manufacture: May 27, 1987
Country of Origin: Skaneateles Falls, NY USA
Certifications: UL Listed (2G Category C 222 No. 125)
Caution Label: Electric shock hazard — do not disassemble; refer servicing to qualified personnel.

Short Description:

Welch Allyn Model 74710 Illuminator Transformer Power Supply with dual handle mounts and intensity control. Designed to power Welch Allyn otoscope and ophthalmoscope handles through a 3.5 V output, the unit provides stable illumination control for diagnostic instruments.

Condition:

The unit shows minor surface scratches and scuffs consistent with normal clinical use but no cracks, dents, or structural damage.

• The green ON/OFF rocker switch is intact and responsive.
• Both handle holders are secure and in good condition.
• The left-side strain relief has a visible tear, though the internal wiring appears unaffected.
• The integrated power cord (approx. 8–9 ft) and handle coiled cables are intact without cuts or frays.
• Overall, the transformer is in very good cosmetic condition for its age.

Functionality Summary:

• Powers On: Yes — indicator switch illuminates.
• Output: 3.5 V AC confirmed — both handles power illumination heads.
• Intensity Control: Responsive and smooth through full range.
• Handles: Both right and left operational; left cable strain relief shows wear.
• No unusual noise, overheating, or flicker noted during test.

What’s Included:

• Welch Allyn Model 74710 Transformer Base Unit
• Two Integrated Handle Mounts
• Integrated 8–9 ft Hospital-Grade Power Cord

What’s Not Included:

• Otoscope or Ophthalmoscope Heads
• Mounting Hardware or Wall Bracket
• User Manual or Service Documentation
• Replacement Handle Cables / Strain Relief

*Items shown in photos are the items that will ship.  If it is not shown in the photos, it is not included*

Stock ID : 38240 (P.O 1200) (WH104 SCB5)

Comments:

Kindly enlarge the images and see them with zooming.

Concern or query: Ask a Question

1. 1.    Overall Condition: As seen in images - Good
2. 2.    Physical Condition: Please review images before bidding - Fair
3. 3.    Working Condition: Has been tested at our end & is in good functionality....Will receive item as pictured…………(Offered AS IS)
4. 4.    “As a whole; the item has not been tested technically or professionally at our end- unable to test --- being sold STRICTLY AS IS! Biomed check is strongly recommended before clinical use!”
5. 5.    Completeness: (with everything seen in the pictures. Please look at all pictures and go through detail description before bidding.)
6. 6.    Caution for Buyers:

DESPITE WHAT MAY BE WRITTEN IN THIS LISTING ALL ITEMS ARE SOLD 'AS IS' & 'WHERE IS' AND UNLESS THE SELLER HAS INDICATED OTHERWISE, THERE WILL BE NO REFUND.

Please make sure you are ready to buy if you decide to place a bid.

Available Documentation (manual etc.): nil

Accessories: Comes with everything you see in pictures nothing more nothing less.

Shipping: