CUSTOM DESIGNED OUTPUT TRANSFORMERS

PUSH-PULL TRANSFORMERS We normally design for full power at 20Hz . Other ratings are available for example, for guitar amplifiers our customers often request full power at 50Hz which greatly reduces the size of the transformer. As a guide, a transformer rated for 20 Hz would be about the same size as a transformer rated for approximately double the power at 50 Hz.

SINGLE-ENDED TRANSFORMERS The key design parameters are the reflected load impedance (Rl), DC standing current, the power rating and the lowest frequency at which the rated power is specified. The transformer will be very large if you specify the full power frequency too low. The bandwidth depends strongly on the driving source impedance (rp). Triodes generally have a much lower rp than pentodes. If we know the driving source resistance we can optimize the primary inductance and the coupling factor which determine the low and high frequency cut off frequencies. It is possible to have a transformer with full rated power at say 40 Hz but a frequency response extending down to say 10 Hz.

FOR PRICE INFORMATION SEE www.sowter.co.uk/tubprice.htm

FOR DIMENSION INFORMATION SEE: www.sowter.co.uk/pacopt.htm

E-MAIL FORM

Please use this form to send us your specification. We will E-Mail you with confirmation that we can make to your specification and the size code. If we cannot make to your spec we will suggest modifications.  With your spec reference and size code you will be able to order or quote at our online shop including shipping cost etc. You can order or quote multiple items to benefit from the lowest possible shipping cost. Please include your own reference such as "T1" etc. so that you can refer to it when you order or if there are any questions.

Your Name:
Your Email Address:
Country:
Delivery Address:
Local telephone (for possible shipping company use):

SPECIFICATION
Your reference (e.g. "T1"):
Type:
Package style:
Secondary Impedance:
Valve type if known:
Type:
Quiescent anode voltage:
Primary Impedance Rl/Ra-a (ohms):
Internal Impedance if known rp (ohms):
Screen taps %:
No-signal DC current (per side in PP) mA:
Power (Watts):
Lowest frequency for maximum power (Hz):
Do you intend to use overall feedback?:
Open loop bandwidth target (-3 dB points) without feedback:
Size preference:
Comments or special requirements:
Quantity:

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E A Sowter Ltd The Boatyard, Cullingham Road IPSWICH IP1 2EG England Tel: +44(0)1473 252794
Fax: +44(0)1473 236188