Hacker RP10 Data - UK Vintage Radio Repair and Restoration Discussion Forum

m11p11 · 29th Dec 2006, 11:07 am

Would anybody know if any changes were made to the RP10 after serial number 38000? I ask because Paul's service data sheet covers up to this number, but my RP10 has a serial number of 50516. This will be my first attempt at a restoration so I'll need as much accurate info as possible.
Thankyou.

Superhet Si · 29th Dec 2006, 6:28 pm

That I think is the change to the separate amp board I think.
Someone will confirm this though I hope.

Paul_RK · 29th Dec 2006, 6:45 pm

The main RP10 change was from a separate amplifier design to having a single large board, and happened well before s/n 38000. My own RP10 manual (April 1st, 1962 issue) gives the following changes affecting models from 38000 onwards:

(a) A new printed board is used.
(b-e) Different oscillator coil and IF transformer type numbers.
(f) A 470 ohm resistor and a .04 mfd condenser, R34 and C41, are added to decouple the 3rd IF HT supply.
(g) R32, 82k, is increased to 120k.
(h) C24, 100mfd, is increased to 300 mfd.

What I can't confirm is whether these were the only changes introduced by the time serial 50516 was reached.

Paul

29th Dec 2006, 11:07 am	#1
m11p11 Retired Dormant Member Join Date: Dec 2006 Location: Haslingden Posts: 1	Hacker RP10 Data Would anybody know if any changes were made to the RP10 after serial number 38000? I ask because Paul's service data sheet covers up to this number, but my RP10 has a serial number of 50516. This will be my first attempt at a restoration so I'll need as much accurate info as possible. Thankyou.

29th Dec 2006, 6:28 pm	#2
Superhet Si Pentode Join Date: Jun 2006 Location: Crawley Down, West Sussex, UK. Posts: 151	Re: Herald RP10 Data That I think is the change to the separate amp board I think. Someone will confirm this though I hope. __________________ My Youtube channel https://www.youtube.com/user/simonspiers

29th Dec 2006, 6:45 pm	#3
Paul_RK Dekatron Join Date: Nov 2003 Location: Fakenham, Norfolk, UK. Posts: 4,256	Re: Herald RP10 Data The main RP10 change was from a separate amplifier design to having a single large board, and happened well before s/n 38000. My own RP10 manual (April 1st, 1962 issue) gives the following changes affecting models from 38000 onwards: (a) A new printed board is used. (b-e) Different oscillator coil and IF transformer type numbers. (f) A 470 ohm resistor and a .04 mfd condenser, R34 and C41, are added to decouple the 3rd IF HT supply. (g) R32, 82k, is increased to 120k. (h) C24, 100mfd, is increased to 300 mfd. What I can't confirm is whether these were the only changes introduced by the time serial 50516 was reached. Paul