Trimming Tools
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Interestingly, they are cheaper in the USA but its a UK based Welsh company..
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Rip-off Britain again ! On 2 Sep 2023 at 10:05, Mike Besemer - WM4B wrote:
Or for those of us in the U.S.:?? t4857/?brutto=1¤cy=USD&gclid=Cj0KCQjwusunBhCYARIsAFBsUP_EVi8PHCBtLhehgC7g 3LPECuCShiVZ8q6sFk2P3BPtWFl2e3lDm8AaAlD9EALw_wcB 开云体育 Links: You receive all messages sent to this group. View/Reply Online (#109102) | Reply To Group | Reply To Sender | Mute This Topic | New Topic Visit group: /g/QRPLabs QRP Labs webpage: QRP Labs shop: Your Subscription | Contact Group Owner | Unsubscribe [mike@...] -- Linux is free if your time is worthless |
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Back in the early 1980's while I worked my way through university as a bench-tech doing more than a thousand VHF/UHF radios over those years I was given a set of ceramic trimmer tools. It eliminated that entire sequence of adjust, remove tool, measure, add tool, adjust, remove tool... I could adjust while measuring without influencing the RF characteristics of the circuit. It even worked fine for doing those tiny multi-turn pots with the brass screw and the trimcaps and the hex tool for doing the slugs in inductors when peaking the helical coils.
If you do an amazon search on "8pcs adjust frequency anti static ceramic screwdriver kit" you will find what I currently use. The original tools were just a piece of ceramic that was jammed in to a wad of rubber that was inserted in to a tiny cardboard tube. Be careful, ceramic is very fragile and you can't do anything more than trimming adjustments, never use it as a conventional screwdriver. But it beats the pants off of those plastic tools or the ones with the tiny metal tips. -- Tisha Hayes, AA4HA Sr Engineer, 4RF Inc. |
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It looks like the T4857 product is thermoplastic made in Taiwan. I also have a ceramic set like Tisha which was also recommended by K7QO.
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But I recently bought a vintage radio and had to buy yet another set, because none of my other tools would fit the 2mm hex cores in a vintage SX-190 that I am restoring. The Hozan D-16 is made from Delrin, but I have no idea if that's a step up from thermoplastic. I haven't cracked any cores yet, knock on wood... 73 de Russ, va3rr On Sun, Sep 3, 2023 at 11:09 AM, Tisha Hayes, AA4HA wrote:
Be careful, ceramic is very fragile and you can't do anything more than |
Mike
Mike Besemer - WM4B
Tisha Hayes, AA4HA
va3rr