In other words, connect a shunt regulator between 0V and Add to watch list. Email Required, but never shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. The approach Spehro suggested worked out very well, producing a very stiff voltage reference for literally 10 cents worth of parts which I programmed with R1 and R2 to roughly 7.

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Drivers Download: Hp Pavilion A Audio

I believe this is primarily due to the primitive-ish emitter-follower-based voltage reference circuit is uses: Back to home page Return to top. Learn more – opens in new window or tab Seller information dockguys We Ship via UPS ground unless otherwise specifiedcharges are calculated upon the weight of the item, the cost of shipping, packaging, and insurance to your location from California. Learn More – opens in a new window or tab Any international shipping and import charges are paid in part to Pitney Bowes Inc.

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No need for excessive precision; a circuit with a TC in the hundreds of ppm would be a huge improvement. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

R23 was replaced with a somewhat larger value to maintain the original current through the output voltage sampling circuit. I was thinking to submit one of my five specimens to experimental surgery to see if I could improve the temperature sensitivity without disrupting the rest of the circuit. Back to home page. Learn More – opens in a new window or tab Any international shipping is paid in part to Pitney Bowes Inc.

HP A Power Supply PP/U

Rugged, dependable, and roughly as old as I am, it is also pretty temperature sensitive. See terms – opens in a new window or tab.

My pleasure Spehro, my modest efforts were more than repaid by auduo time your guidance saved me from going down blind alleys: Expedited and Next Day Shipping Services: Q4 and R22 were removed.

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See other items More The item may have some signs of cosmetic wear, but is fully operational and functions as intended. If you run into any problems with your order, please let us know so we can do our best to satisfy your purchase.

The now-empty emitter and base connections for Q4 were shorted with a wire to complete the circuit. Sign up for newsletter.

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HP Hewlett Packard 721A 30 Volt DC Power Supply

Thanks Spehro, this definitely sounds like the hot ticket, I’ll give it a try and let you know how it goes: Sign up or log in Sign up using Google. Learn more – opens in a new window or tab. Delivery times may vary, especially during peak periods.