SM0VPO Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.
SM0VPO Forum

Hamradio and electronics discussions for visitors to Harry's Homebrew Homepage www.sm0vpo.com - Commercial use of information published here require permission of the author. Private use is free. Citations used externally must include a link to the source


Discrete PLL for single transistor FM transmitter

2 posters
Post new topic   Reply to topic

SM0VPO Forum :: SM0VPO :: Questions / Discussions

Go down

Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by Ivan Mon Feb 14, 2022 7:03 pm

dare4444 wrote:It's 74HC00
You wrote "CD4060" ?? Anyway, 74HC00 can be replaced with CD4011, 74HC74 with CD4013.

VBR Ivan

Ivan

Posts : 793
Join date : 2012-11-25
Age : 64
Location : Praha, Czechia

Back to top Go down

Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by dare4444 Mon Feb 14, 2022 8:37 am

Ivan wrote:
dare4444 wrote:We would be really pushing CD4060 but I've tested the chip with 25MHz crystal and it still worked fine.
Maybe increasing the Vcc to +15V or even +18V would help. CMOS 4000 chips get faster with increasing Vcc. +18V is the maximum allowed value.

VBR from Ivan
It's 74HC00

dare4444

Posts : 427
Join date : 2013-03-19

Back to top Go down

Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by Ivan Mon Feb 14, 2022 7:46 am

dare4444 wrote:We would be really pushing CD4060 but I've tested the chip with 25MHz crystal and it still worked fine.
Maybe increasing the Vcc to +15V or even +18V would help. CMOS 4000 chips get faster with increasing Vcc. +18V is the maximum allowed value.

VBR from Ivan

Ivan

Posts : 793
Join date : 2012-11-25
Age : 64
Location : Praha, Czechia

Back to top Go down

Discrete PLL for single transistor FM transmitter Empty Discrete PLL for single transistor FM transmitter

Post by dare4444 Mon Feb 14, 2022 2:14 am

Del


Last edited by dare4444 on Wed May 25, 2022 8:46 am; edited 1 time in total

dare4444

Posts : 427
Join date : 2013-03-19

Back to top Go down

Discrete PLL for single transistor FM transmitter Empty Re: Discrete PLL for single transistor FM transmitter

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics
Post new topic   Reply to topic

SM0VPO Forum :: SM0VPO :: Questions / Discussions

 
Permissions in this forum:
You can reply to topics in this forum