 Posted: Wed Oct 01, 2014 5:56 pm Post subject: Mohsin |
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| This must have been a common failure as the 145 added a separate current-limiter pc bd to the unit, which is very simple. I plan to add
this to my unit as well, to protect the output transistors from frying. |
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| Posted: Mon Sep 22, 2014 6:09 pm Post subject: |
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| But you've converted your 20MHz generator into a 1MHz generator.
OPA547 slew rate is 6V/us, while the Wavetek 145 spec is 20ns at 15Vp-p. The original output transistors are 500MHz parts. Dave Wise |
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| Posted: Sat Jun 28, 2014 8:29 pm Post subject: 143 |
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| My outputs were fried.
I disconnected the output and replaced with an OPA547. Cheat to win  |
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| Posted: Fri Mar 02, 2012 2:57 am Post subject: |
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| The manual for the 145 is available on the web for free. Turns out that the 145 is very similar to the 143, but has the added pulse output circuitry.
I think the main board and power supply bds are the same and the schematics and parts lists are in the manual. My unit has a fried output transistor. This must have been a common failure as the 145 added a separate current-limiter pc bd to the unit, which is very simple. I plan to add this to my unit as well, to protect the output transistors from frying. Many of the schematics in the manual say 143/145 on them. Bob |
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| Posted: Wed Feb 22, 2012 6:28 am Post subject: Wavetek 143 manual |
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| Hi,
I just bought a non-working 143 on ebay. Just wondering if you ever found the manual. If not, maybe we can share info anyway. Best wishes, Bob r l g r i e b at att dot net |
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| Posted: Mon Mar 17, 2008 9:42 pm Post subject: Documents for repairing Wavetek 143 Function generator |
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| Hello,
can somebody help me with schematic, manual for repairing Wavetek 143 Function generator? Thanks! Timo |
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