Custom Built RCA 45 Push-Pull Tube Amplifier

Custom-built vintage 45 Push-Pull (PP) Vacuum Tube Amplifier featuring RCA 45 tubes, TAMURA F486 output transformers, and a vintage TANGO power transformer.

This is a custom-built amplifier and not a factory-produced RCA, TAMURA, or TANGO amplifier.

The previous owner used and listened to this amplifier with the included RCA 45 tubes.

Main Components

Output Tubes:

• RCA 45 × 4

• These are NOT engraved-base RCA 45 tubes

Other Tubes:

• GE 6AV11 × 4

• NATIONAL UNION 5Y4G Rectifier Tube

Output Transformers:

• TAMURA F486 PP

Power Transformer:

• Vintage TANGO

Speaker Outputs

Speaker terminals are provided for:

• 4Ω

• 8Ω

• 16Ω

Please confirm the actual terminal configuration in the listing photos.

Condition / Operation

The amplifier was previously used with the included RCA 45 tubes.

It was operating as an audio amplifier during the previous owner's use.

Because this is a custom-built vintage amplifier using transformers and vacuum tubes that are more than 30 years old, future inspection, adjustment, or maintenance may be required.

Testing Limitations

No detailed electrical measurements or comprehensive professional bench testing have been performed.

The following specifications have NOT been independently measured or verified:

• Rated output power

• Frequency response

• Distortion

• Noise level

• Tube characteristics

• Transformer characteristics

• Internal component values

Current electrical performance is not guaranteed to match the original specifications of the individual vintage components.

Cosmetic Condition

This is a custom-built vintage amplifier and shows age-related signs of previous use.

Please carefully review all listing photos for the exact condition, construction, internal components, wiring, tubes, and transformers.

Included Items

• Custom-built 45 PP Tube Amplifier

• RCA 45 Tubes × 4

• GE 6AV11 Tubes × 4

• NATIONAL UNION 5Y4G Rectifier Tube

• Power Cable

• Transparent Acrylic Bottom Plate with Rubber Feet

Only the items shown in the listing photos are included.

Dimensions & Weight

Width: Approx. 25 cm
Depth: Approx. 18 cm
Height: Approx. 17 cm
Weight: Approx. 7.2 kg

This is an unusually compact design for a 45 push-pull tube amplifier.

Important Notice

This is a custom-built vintage vacuum tube amplifier, not a factory-manufactured commercial product.

The major transformers and vacuum tubes are vintage components more than 30 years old.

Because of its age and custom construction, the buyer should have appropriate knowledge of vintage tube audio equipment.

Professional inspection and maintenance are recommended as necessary before extended use.

All my products are 100% Authentic.

We usually ship within 5〜10 business days of receiving cleared payment.

・For U.S. Buyers (Shipping to the United States):
 Import duties, taxes, and related customs fees are already included in the item price or shipping cost (DDP: Delivered Duty Paid). You will not be required to pay any additional customs charges upon delivery.

Note: Items over USD 2,500 per transaction (including shipping) or those under the Authenticity Guarantee service may be excluded.

・For Buyers Outside the U.S.:
 Import duties, taxes, and charges are not included in the item price or shipping charges. These costs are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.
 We do not mark merchandise values below value or mark items as "gifts" – U.S. and International government regulations prohibit such behavior.