eD,
I have less than 100 pcs J74BL on hand and thus I would like to stop selling from now on and keep for my own use. I still have some J74V for sales if you are interested.
I have less than 100 pcs J74BL on hand and thus I would like to stop selling from now on and keep for my own use. I still have some J74V for sales if you are interested.
Ok!
I need some quads but.....do what?😕
About J74V what Idss they have? Do you matched them too ?
eD
I need some quads but.....do what?😕
About J74V what Idss they have? Do you matched them too ?
eD
Hi Spencer,
Can you supply me with 2x pairs of matched 2sk170 GR (near to 5mV).
Many thanks, Lucas
Can you supply me with 2x pairs of matched 2sk170 GR (near to 5mV).
Many thanks, Lucas
eD, Email send to you!
John and Lucas,
K170BL continue to sell both matched and unmatched. No GR grade but I have low Idss K170BL about 6.8mA Idss matched. Please write to my hotmail address if interested.
J74BL out of stock!
Spencer
John and Lucas,
K170BL continue to sell both matched and unmatched. No GR grade but I have low Idss K170BL about 6.8mA Idss matched. Please write to my hotmail address if interested.
J74BL out of stock!
Spencer
Hi Spencer,
Thanks for getting back to me. The design calls for 4-6mA jfets. What would be the effect of 6.8mA Idss? More gain? Would this potentially unbalance the whole circuit? I am building Mads K Hoaas's Atlantis RIAA.
Many thanks
Lucas
Thanks for getting back to me. The design calls for 4-6mA jfets. What would be the effect of 6.8mA Idss? More gain? Would this potentially unbalance the whole circuit? I am building Mads K Hoaas's Atlantis RIAA.
Many thanks
Lucas
Can you post the circuit here so that others can help? Most likely the bias source resistor need to be changed to higher value for high Idss jfet.
I'd rather not go there, as I'm not an EE. I wanted a design that was tried and tested and highly regarded, so I don't want to go tinkering. Many thanks though, Lucas
Here's the schematic of the design I will be following. I have PCBs on the way:
What do you think? 6.8mA ok as it is, or are adjustments necessary?
What do you think? 6.8mA ok as it is, or are adjustments necessary?
Here's the schematic of the design I will be following. I have PCBs on the way
What do you think? 6.8mA ok as it is, or are adjustments necessary?
What do you think? 6.8mA ok as it is, or are adjustments necessary?
Lucas, if the Idss of K170 is 4mA, how can there be 5mA flowing down the jfet path??
I think the jfets Idss should be at about 6mA as there is a 10R source resistor to give you about -0.05V bias (or -1mA less from Idss).
In conclusion, there is an error on the Idss specification in the circuit. On the other hand, I do not see a big issue to use 6.8mA jfets as the source resistor can be increase to get 5mA current flow at the jfets.
I think the jfets Idss should be at about 6mA as there is a 10R source resistor to give you about -0.05V bias (or -1mA less from Idss).
In conclusion, there is an error on the Idss specification in the circuit. On the other hand, I do not see a big issue to use 6.8mA jfets as the source resistor can be increase to get 5mA current flow at the jfets.
Another comment is that the gain of the circuit will be smaller if the source resistor is increased. Thus it should not be too high say below 15 ohm.
Hi Spencer,
I'd like 8 pieces J74V, matched pairwise if possible.
How much is that with shipment to France?
Are there any K170V available?
(sorry, I didn't read the entire thread)
If yes, I'd like 8 pieces of those too.
Thanks,
pilli