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vk3kri

@vk3kri@mastodon.radio
mastodon 4.6.6
  • Open on mastodon.radio

50 years of building things from other peoples junk.
Ham for too long !(45 years)
Yes I have reground my own crystals. But these days I'd use a DDS chip.
#AM #audio #timenuts
I never want to analyse another #LWM2M trace again!

0 Followers
0 Following
11 Posts
Joined November 05, 2022

Posts

Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Jul 23, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @k3ym0@infosec.exchange
@k3ym0@infosec.exchange The first time I came across DNS tunneling in the wild was traffic monitoring hardware sold as a security device.. Turns out it was trying to do DNS tunneling to check for a valid licence.. My advice was to dump it was not taken. Theres always one weirdo somewhere tailing their DNS logs!
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Jul 11, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @Quantensalat@scicomm.xyz
@Quantensalat@scicomm.xyz IN "Linear Amplifiers for Mobile Operations" https://www.communication-concepts.com/content/AN762/AN762_Application_Note.pdf Granberg says that if the DC feed is done through the center tap of the '1 turn' transformer, rather than the bifilar feed , the IMD and power output is unaffected , but 2nd harmonic suppression may be reduced by 10 dB. Given he was doing this in the Motorola lab I figure he knew what he was doing , but I still don't see how it works.
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Jul 10, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @Quantensalat@scicomm.xyz
@Quantensalat@scicomm.xyz @upofadown@mstdn.ca I have always maintained that this arrangment is two seperate transformers, as you have modeled in spice.
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Jun 27, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @bloor@bloor.tw
@bloor@bloor.tw Its not a piece of mosaic pin that's fallen out of one of your kitchen knives is it?
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · May 09, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio

Not much from today's hamfest, but I always thought the Heuer LM11 level meter was neat back when I used them at work, back in the '90s. The pair mainly used for level testing on voice circuits. Both of them still work, so there's a couple of more items for my collection of obsolete Aussie test equipment.

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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · May 08, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio

@VE7WYC@mstdn.ca
Waiting at the traffic lights for a plane to take off across the road was a rather surreal experience.

mstdn.ca

Bill VE7WYC (@VE7WYC@mstdn.ca) - Mastodon Canada

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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Apr 29, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @nev@flipping.rocks
@nev I see your owl and raise you one owl. (December 2022 , next door neighbour's TV antenna)
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Apr 22, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio

Ooohh ! TOKEN RING!

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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Apr 21, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @whynothugo@fosstodon.org
@whynothugo I assume this is how everyone charges batteries.
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Apr 01, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @oz1lqo@techhub.social
@oz1lqo@techhub.social hmm - How about a long term plot of the tidal effects from the sun and the moon!
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Open post
vk3kri
vk3kri @vk3kri@mastodon.radio · Jan 25, 2026
vk3kri
@vk3kri@mastodon.radio

50 years of building things from other peoples junk. Ham for too long !(45 years) Yes I have reground my own crystals. But these days I'd use a DDS chip. #AM #audio #timenuts I never want to analyse another #LWM2M trace again!

mastodon.radio
Replying to @DD3AH@social.darc.de
@DD3AH@social.darc.de @Hoonse@chaos.social Add one of these guys for tuning : https://www.aliexpress.com/item/1005005072238869.html A 400 position one tunes pretty nice. 2 x ball bearings are almost too smooth. I traced what I thought was some backlash to an unbalanced knob responding to gravity.
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